Official Statistics

Background quality report UK armed forces: April 2024

Updated 11 October 2024

Background Quality Report for UK Armed Forces Personnel Statistics

This Background Quality Report (BQR) reports on the quality of all the Official Statistics, using UK Armed Forces personnel data (including Diversity information), applications statistics, location statistics for UK Regular Armed Forces and MOD Civilians and Intake into the UK Regular Forces by Parliamentary Constituency, produced by Analysis (Tri-Service).

This provides background information on our statistical outputs and indicates the level of quality of data used in our statistical outputs. Information is provided on the quality of the statistics used within our publications detailing the strengths, weaknesses and methods used.

Analysis Tri-Service Statistical Outputs:

• UK Full-time Armed Forces Statistics
• UK Regular and Reserve Forces Diversity Statisics
• UK Reserve Forces Statistics
• UK Cadet Forces Statistics
• Armed Forces Applications Statistics
• UK Regular Forces and Civilian Location Statistics

Updated: 11 October 2024

Background Quality Report: UK Full-time Armed Forces Statistics

1. Contact

This section provides details on the Analysis (Tri-Service) Head of Branch is the Responsible Statistician for these statistics.

Contact details are:

Analysis (Tri-Service)
Ministry of Defence
Floor 3 Zone M
Main Building, Whitehall
London SW1A 2HB

E-mail: Analysis-Tri-Hd@mod.gov.uk

Website: Statistics at MOD

2. Introduction & Statistical Presentation

The Ministry of Defence (MOD) publishes a wide range of Armed Forces personnel statistics. The main purpose of these statistics is; to inform policy and decision making within the Department, to measure the performance of the Ministry of Defence against Government and Parliament targets, and also to inform general debate in Government, Parliament and the wider public.

These personnel statistics are primarily counts of the number of Service personnel in the Armed Forces (or ‘strengths’), the number of personnel joining (intake) and numbers of personnel leaving (outflow) all of which are reported by various categories of interest and at differing levels of detail.

‘Strength’ counts are reported against Workforce Requirement figures for the Trained (RN/RM & RAF) and Trade Trained (Army) UK Full-time Armed Forces, which enables surpluses and deficits to be calculated.

This background quality report covers the primary military personnel statistics published on the Analysis (Tri-Service) website on GOV.UK.

The publications we produce which contain statistics on UK Full-time Armed Forces personnel are:

• Quarterly Service Personnel Statistics
• Bi-Annual Diversity Statistics
• Annual Location Statistics

On 29 June 2016, the MOD announced that the Army will in future plan to use Regular and Reserve Phase 1 trained personnel in response to crises within the UK. Following this, the term ‘Trained Strength’ will include all Army personnel trained in the core function of their Service (i.e. those who have completed Phase 1 training). The MOD has consulted on these changes and the resultant impact it will have on Analysis (Tri-Service) publications and a consultation response were published on 7 November 2016.

From 1 October 2016 edition of Monthly Service Personnel Statistics onwards, Army personnel who have completed Phase 1 training (basic Service training) but not Phase 2 training (trade training), are considered Trained personnel. This change will enable the Army to meet the Strategic Defence and Security Review (SDSR) 15 commitment to improve support to UK resilience. The Trained Strength definition for the Royal Navy, RAF, Maritime Reserve and RAF Reserves has not changed, reflecting the requirement for their personnel to complete Phase 2 training to be able to fulfil the core function of their respective Services. Army personnel who have completed Phase 2 training will now be called ‘Trade Trained’. This population aligns with the old definition of trained personnel, therefore maintaining the continuity of the statistical time series and will continue to be counted against the Workforce Requirement and SDSR target for 2020.

Previous reports containing statistics on UK Full-time Armed Forces personnel can be found on the archived Analysis (Tri-Service) website on the National Archives site:

• UK Armed Forces Monthly Personnel Report (MPR)
• UK Armed Forces Quarterly Personnel Report (QPR)
• UK Armed Forces Annual Personnel Report (APR)
• UK Regular Forces Diversity Dashboard
• UK Defence Statistics Bulletin 2.01 (excluding reserve forces)
• UK Defence Statistics Bulletin 2.03 (excluding location, civilian and compensation statistics) TriService publications (TSP 1 – TSP 10).

These historic reports can be found on the archived Analysis (Tri-Service) website on the National Archives site.

Regarding the protected characteristics presented in the Biannual Diversity Publication, please see the lines that follow for further context:

• Gender - We recognise that the terminology on this topic area is evolving. Within our official statistics data collection, the term ‘Gender’ has been used interchangeably with ‘Sex’. When we use the term ‘Gender’, we are referring to ‘Sex’ - a binary variable categorised as Female or Male. This is due to the JPA system architecture where this data was collected using the term ‘Gender’ as a substitution for ‘Sex’.
• Age - is calculated as the difference between an individual’s Date of Birth, and the date of their Intake/Outflow (‘Flow Date’) as recorded on the Joint Personnel Administration (JPA) system.
• Religion - as declared by personnel on the Joint Personnel Administration system. Please note that ‘No religion’ includes personnel who have self-identified as having no religion on JPA, including personnel declaring themselves as Agnostic, Atheist and Secularist. This does not include personnel with an unrecorded religion.
• Nationality - UK Nationality includes any individuals whose nationality is recorded on the Joint Personnel Administration (JPA) database as Anguilla, Bermuda, British, British Hong Kong, British Overseas Territories, British Antarctic Territory, British Indian Ocean Territory, British Virgin Islands, Cayman Islands, Falkland Islands, Gibraltar, Montserrat, Pitcairn Islands, Saint Helena, Ascension and Tristan da Cunha, South Georgia and the South Sandwich Islands or Turks and Caicos Islands
• Sexual Orientation - Declaration of Sexual Orientation is not mandatory for Armed Forces personnel. The statistics in the Biannual Diversity relate to personnel with a known Sexual Orientation.
• Ethnicity - White Minority Ethnicities are included in the White category. This is due to the JPA system architecture where this data was collected as White (including White Minorities) in previous years. For Strength, ‘Age’ is calculated as the difference (rounded down) between ‘Date of Birth’ and the situation as at the first of the month.

3. Statistical Processing

3.1 Source data

The statistics are principally derived from the Department’s Joint Personnel Administration (JPA) system, which is used for the administration of all Armed Forces personnel, supplemented by information from single Services’ management systems and other centrally managed databases. Prior to the introduction of JPA in 2006/07, legacy single Service administration systems were used to produce the statistics.

3.2 Frequency of data collection

Extracts are taken from JPA each month and stored on separate databases to form a time series.

3.3 Data collection

The extracts are taken six calendar days after the end of the month and the situation as at the first of the month is calculated. This ensures most late-reporting is captured.

3.4 Data validation

Data goes through a series of automatic validation checks and edits to ensure the basic quality of the data and a series of derived fields are calculated.

The data is then made available to Analysis (Tri-Service) single Service manpower branches. They undertake a wide range of validation checks and implement specialist editing rules using their expert knowledge and experience as well as data obtained from other sources within the Department.

3.5 Data compilation

Once the data is confirmed as being accurate the database is queried to produce the range of tables published. These tables undergo several layers of scrutiny to ensure the outputs are accurate and consistent.

The statistics are counts of military reserve personnel by a range of categories, including breakdowns by: Navy, Army and RAF; officer and other ranks; trained and untrained.

4. Quality Management

This section will briefly describe the overarching processes in place to manage quality e.g. annual risk assessments, and offer the opportunity to outline results of recent quality assessments.

4.1 Quality Assurance

The MOD’s quality management process for Official Statistics consists of three elements: (1) Regularly monitoring and assessing quality risk via an annual assessment; (2) Providing a mechanism for reporting and reviewing revisions/corrections to Official Statistics; (3) Ensuring BQRs are publishing alongside reports and are updated regularly.

4.2 Quality Assessment

At the time of the last Quality Assessment in 2023, the Quarterly SPS received a rating of ‘6’. Additionally, the Diversity Statistics publication received a ‘2’ for this same assessment.

5. Relevance

This section is about the degree to which the statistical product meets user needs in both coverage and content.

Analysis (Tri-Service) frequently meet with customers within the Department to discuss data, results, interpretation, and any changes to requirements. They also seek feedback from a wider range of internal and external customers.

We have made our own assessment of what these statistics could be used for using the categorisation in the UKSA paper The Use Made of Statistics.

We believe the statistics could be used as follows:

i.Informing the general public’s choices:
about the performance of government and public bodies

ii. Government decision making about policies, and associated decisions about related programmes and projects:
policy monitoring

The underlying data also allow for:

iii. Government decision making about policies, and associated decisions about related programmes and projects:
policy making

iv. Facilitating academic research.

The Service Personnel Report should be used as the authoritative source of regulars strengths and flows statistics.

The MOD has recently consulted on changes to the definition of Army trained strength and the resultant impact it will have on Analysis (Tri-Service) publications and a consultation response were published on 7 November 2016. Changes have been implemented into Monthly Service Personnel Statistics from the 1 October 2016 publication onwards.

A formal consultation on Changes to MOD Armed Forces Personnel Statistics ran between 20 March to 16 April 2015 and 27 May to 18 June 2015. This was following an internal review of MOD Tri-Service publications content and sought further user views on proposed changes to publications.

Detailed information on previous consultations can be found via the National Archives

Users are also encouraged to provide feedback on statistics produced by Analysis (Tri-Service) and also to sign up to the mailing list for their publication of interest, to receive updates to the statistics or to be made aware of any changes: Analysis-Tri-Service@mod.gov.uk

The principal customers for the Tri-Service publications are within the People area of the Ministry of Defence. They are used to inform and measure Service personnel strategy in areas such as pay & allowances and overall troop numbers, and in particular the Future Reserves 2020 Programme (FR20). This product is also used to answer parliamentary questions and Freedom of Information requests. The publications are also used to inform the monthly Defence Board Management Information. The principal stakeholders for Service personnel statistics are within the Chief of Defence Personnel area of the Ministry of Defence. The statistics are used to inform and measure Service personnel strategy in areas such as pay & allowances and equality & diversity. They are also used to answer parliamentary questions and Freedom of Information requests. The information is also used to inform the internal monitoring and regular monthly reporting to the Defence Board.

For detail on pre-release access to Analysis (Tri-Service) publications please see the Analysis (Tri-Service) pre-release access list for the most up to date list of roles receiving pre-release access.

People in the roles with access receive pre-release access to the publication up to 24 hours in advance of publication.

The coverage of these statistics is close to, if not equal to, all Full-time Armed Forces personnel, Full Time Reserve Service personnel and Gurkhas. The Service Personnel Statistics publication includes statistics on the Reserve Forces, more details of which are covered in the report on Reserve Forces information. There are no known unmet user needs.

6. Accuracy and Reliability

This section is about the differences between the estimates and the unknown true values.

6.1 Overall Quality

All personnel in the Regular Armed Forces must be recorded on JPA in order for them to receive their pay. Therefore the overall strength figures are accurate. However, more detailed breakdowns relying on the information recorded for each individual can be less accurate due to variable quality of the data entered for these different fields.

The variation in quality is partly due to key information required for managing individuals being recorded and updated centrally, whereas other information is left to the individual to complete through a self-service tool. There is also a reasonable amount of late reporting which can adversely impact the statistics, particularly for exits and changes of individual’s status from untrained to trained. Obtaining the extract on the sixth calendar day and then calculating the strength at the first of the month overcomes much of this late reporting.

The monthly datasets are passed through a range of automatic and manual validation and editing routines in order to make the key fields as accurate as possible, often drawing upon alternative data sources. A range of detailed breakdowns are produced and these are compared with previous month’s outputs and discrepancies are examined. The detailed tables are used by the single Services (Navy, Army, and Air) to manage their personnel and inform policy and strategy.

Regular feedback ensures Analysis (Tri-Service) staff are kept abreast of any changes or potential issues with the data and statistics, which is fed into the data validation and editing process.

6.2 Data Revisions

Data revisions are handled in accordance with MOD’s Official Statistics Revisions and Corrections Policy.

There were no revisions to the Quarterly Service Personnel Statistics, and Bi-Annual Diversity Statistics Publications around the time this Background Quality Report was last updated.

7. Timeliness and Punctuality

This section reports on the time gap between publication and the reference period (timeliness) and the gap between planned and actual publication dates (punctuality).

7.1 Timeliness

The quarterly extracts are taken on the sixth calendar day. The editing and production process usually takes around 2 weeks at the single Service level. It then takes a further 2-4 weeks to compile these data at a tri-Service level.

7.2 Punctuality

The following table provides an example of the timeline for 1 April 2024 Statistics.

Publication	Situation Date	Publication Date
Service Personnel Statistics	1 April 24	30 May 24

Historic and planned publication dates can be found on the Publication Release Dates section of the Gov.uk Statistics at MOD webpage and on the UK National Statistics Publication Hub.

8. Coherence and Comparability

This section examines: the degree to which data that are derived from different sources or methods, but refer to the same topic, are similar (coherence); and the degree to which data can be compared over time and domain (comparability).

Analysis (Tri-Service) published statistics on UK Armed Forces are the definitive personnel statistics in the MOD. There are no other publicly available regular publications on the numbers of UK Armed Forces with which to ensure coherence. Within the MOD direct queries of the Joint Personnel Administration system will produce slightly different numbers due to timing and quality issues.

The UK Armed Forces personnel statistics are not always directly comparable with other countries’ statistics due to definitional differences of what constitutes an Armed Force. In some countries, particularly in Europe, part of the domestic police force is included in the Armed Forces. Similarly, there are not always direct equivalents to the Royal Navy / Royal Marines, Army, and Royal Air Force in other countries.

The total number of Service personnel are comparable across time, however the breakdown of smaller categories are generally not comparable due to structural changes in the physical and financial structures of the MOD. The introduction of JPA in 2006/07 impacted on the availability of certain statistics, as some information (divorce rates for the RAF for instance) were available under the legacy system but not on JPA. This change led to a revision of what and how much can be published – for example some categories of outflow had to be combined.

Annual editions of UK Defence Statistics compendium dating back to 1992, plus historic Tri-Service publications dating back to 2002, are available in the National Archives.

9. Accessibility and Clarity

This section reports on: the ease with which users are able to access the data, the format in which the data are available, and the availability of supporting information (accessibility); and the quality and sufficiency of the metadata, illustrations and accompanying advice (clarity).

Current publications consist of detailed Excel tables containing a historic time-series of statistics and a PDF report containing commentary, graphs and tables on trends in the statistics. The commentary in our reports identifies and analyses the key changes in the data and provides summary statistics and policy context. Graphs, tables and other data visualisation methods are used to further explain these trends.

Previous Analysis (Tri-Service) personnel reports are published on GOV.UK and are available as PDFs or Excel value copies. Other formats may be possible for Analysis (Tri-Service) to produce on request

All Analysis (Tri-Service) publications that use these data can be found under the “Military” and “Combined military and civilian” sections under the “Personnel statistics” heading on the statistics by topic section of the MOD National and Official Statistics by topic webpage

They can also be accessed via the Statistics release calendar

Copies of the reports are also placed in the House of Commons library.

Data revisions are handled in accordance with the MOD’s Official Statistics Revisions and Corrections Policy.

10. Trade-offs between Output Quality Components

This section reports the extent to which different aspects of quality are balanced against each other.

The main trade-off is between timeliness and quality. To ensure statistics are timely the editing and validation process is restricted to around two weeks and a significant amount of automatic editing is utilised. Spending more time investigating every suspect individual personnel record could marginally improve quality at a detailed trade/rank level but is unlikely to impact the aggregated statistics published in our reports.

11. Cost and Respondent Burden

This section is about the effectiveness, efficiency and economy of the statistical output.

Personnel Statistics and Analysis has six branches dedicated to producing information relating to manpower and providing analysis and advice, the majority of time is spent on adding value through analysing, forecasting and answering ad-hoc enquiries as well as producing the National Statistics.

There is very little respondent burden as the majority of the data is automatically obtained from administrative systems. However, this is supplemented with small amounts of data as well as input from other areas within the MOD.

12. Confidentiality, Transparency and Security

This section is about the procedures and policy used to ensure sound confidentiality, security and transparent practices.

12.1 Confidentiality

All published outputs are counts of individuals in particular groupings. Where there are possible disclosure issues in reporting protected characteristics, outputs are rounded according to Analysis (Tri-Service) rounding policy, which prevents disclosure of information on individuals.

Disclosure control is conducted on all statistical information provided by the MOD to safeguard the confidentiality of individuals.

12.2 Transparency

The reports provide commentary on the key features of the outputs and identify any issues or caveats to the data. This quality report provides further information on the method, production process and quality of the output.

12.3 Security

All staff involved in the statistical production process adhere to all MOD, Civil Service and data protection regulations. The data is stored, accessed and analysed using the MOD’s restricted network and IT systems, and access to raw data is password protected and approval for access is granted only by the Head of Personnel Statistics.

The Analysis (Tri-Service) website can be accessed here: Statistics at MOD

Updated: 11 October 2024

Background Quality Report: UK Reserve Forces Statistics

1. Contact

This section provides details on the Analysis (Tri-Service) Head of Branch is the Responsible Statistician for these statistics.

Analysis (Tri-Service)
Ministry of Defence
Floor 3 Zone M
Main Building, Whitehall
London SW1A 2HB

E-mail: Analysis-Tri-Hd@mod.gov.uk

Website: Statistics at MOD

2. Introduction & Statistical Presentation

Analysis (Tri-Service) publishes a large range of Armed Forces personnel statistics, mainly to inform policy and decision making within the Department. The statistics are also used to measure performance against MOD, Government and Parliament targets and to inform general debate in government, parliament and the wider public. The statistics form part of that portfolio of service personnel and report on the UK Reserve Forces, including regular reserves, volunteer reserves, sponsored reserves and the University Service Units. They are counts of personnel numbers broken down by various categories.

This background quality report covers the principal military personnel statistics published on Statistics at MOD

• Service Personnel Statistics (published Quarterly)

• Diversity Statistics (published biannually)

On 29 June 2016, the MOD announced that the Army will in future plan to use Regular and Reserve Phase 1 trained personnel in response to crises within the UK. Following this, the term ‘Trained Strength’ will include all Army personnel trained in the core function of their Service (i.e. those who have completed Phase 1 training). The MOD has consulted on these changes and the resultant impact it will have on Analysis (Tri-Service) publications and a consultation response were published on 7 November 2016.

From 1 October 2016 edition of Monthly Service Personnel Statistics onwards, Army personnel who have completed Phase 1 training (basic Service training) but not Phase 2 training (trade training), are considered Trained personnel. This change will enable the Army to meet the SDSR 15 commitment to improve support to UK resilience. The Trained Strength definition for the Royal Navy, RAF, Maritime Reserve and RAF Reserves has not changed, reflecting the requirement for their personnel to complete Phase 2 training to be able to fulfil the core function of their respective Services. Army personnel who have completed Phase 2 training will now be called ‘Trade Trained’. This population aligns with the old definition of trained personnel, therefore maintaining the continuity of the statistical time series and will continue to be counted against the Workforce Requirement and SDSR target for 2020.

Regarding the protected characteristics presented in the Biannual Diversity Publication, please see the lines that follow for further context:

• Gender - We recognise that the terminology on this topic area is evolving. Within our official statistics data collection, the term ‘Gender’ has been used interchangeably with ‘Sex’. When we use the term ‘Gender’, we are referring to ‘Sex’ - a binary variable categorised as Female or Male. This is due to the JPA system architecture where this data was collected using the term ‘Gender’ as a substitution for ‘Sex’.
• Age - is calculated as the difference between an individual’s Date of Birth, and the date of their Intake/Outflow (‘Flow Date’) as recorded on the Joint Personnel Administration (JPA) system.
• Religion - as declared by personnel on the Joint Personnel Administration system. Please note that ‘No religion’ includes personnel who have self-identified as having no religion on JPA, including personnel declaring themselves as Agnostic, Atheist and Secularist. This does not include personnel with an unrecorded religion.
• Nationality - UK Nationality includes any individuals whose nationality is recorded on the Joint Personnel Administration (JPA) database as Anguilla, Bermuda, British, British Hong Kong, British Overseas Territories, British Antarctic Territory, British Indian Ocean Territory, British Virgin Islands, Cayman Islands, Falkland Islands, Gibraltar, Montserrat, Pitcairn Islands, Saint Helena, Ascension and Tristan da Cunha, South Georgia and the South Sandwich Islands or Turks and Caicos Islands
• Sexual Orientation - Declaration of Sexual Orientation is not mandatory for Armed Forces personnel. The statistics in the Biannual Diversity relate to personnel with a known Sexual Orientation.
• Ethnicity - White Minority Ethnicities are included in the White category. This is due to the JPA system architecture where this data was collected as White (including White Minorities) in previous years. For Strength, ‘Age’ is calculated as the difference (rounded down) between ‘Date of Birth’ and the situation as at the first of the month.

3. Statistical Processing

3.1 Source Data

The statistics are principally derived from the Department’s Joint Personnel Administration (JPA) system, which is used for the administration of all Armed Forces personnel, supplemented by information from single Services’ management systems and other centrally managed databases. Prior to the introduction of JPA in 2006/07, legacy single Service administration systems were used to produce the statistics.

3.2 Frequency of data collection

Extracts are taken from JPA each month and stored on separate databases to form a time series.

3.3 Data collection

Data goes through a series of automatic validation checks and edits to ensure the basic quality of the data and a series of derived fields are calculated.

The data is then made available to Analysis (Tri-Service) single Service manpower branches. They undertake a wide range of validation checks and implement specialist editing rules using their expert knowledge and experience as well as data obtained from other sources within the Department.

3.4 Data validation

Data goes through a series of automatic validation checks and edits to ensure the basic quality of the data and a series of derived fields are calculated.

The data is then made available to Analysis (Tri-Service) single Service manpower branches. They undertake a wide range of validation checks and implement specialist editing rules using their expert knowledge and experience as well as data obtained from other sources within the Department.

3.5 Data compilation

Once the data is confirmed as being accurate the database is queried to produce the range of tables published. These tables undergo several layers of scrutiny to ensure the outputs are accurate and consistent.

The statistics are counts of military reserve personnel by a range of categories, including breakdowns by: Navy, Army and RAF; regular and volunteer reserves; officer and other ranks; trained and untrained. There are also counts of personnel leaving and joining certain parts of the reserve forces.

Between 2007 and 2012, Naval Service volunteer reserve data were provided direct to Analysis (Tri-Service) by the unit responsible for administering those forces. In 2012 this database was closed and records were transferred on to JPA, however the JPA data were not considered robust enough in time for April 2012 publication and therefore the information was again sourced from the administration unit. Following work to assess the quality of the JPA data, the data processing and reporting methods were brought into line with those in the other Services (and other Defence Statistics personnel data.) As a result, Analysis (Tri-Service) has been able to retain monthly extracts for statistical purposes since October 2012 and can now report from this source.

4. Quality Management

This section will briefly describe the overarching processes in place to manage quality e.g. annual risk assessments, and offer the opportunity to outline results of recent quality assessments.

4.1 Quality Assurance

The MOD’s quality management process for Official Statistics consists of three elements: (1) Regularly monitoring and assessing quality risk via an annual assessment; (2) Providing a mechanism for reporting and reviewing revisions/corrections to Official Statistics; (3) Ensuring BQRs are publishing alongside reports and are updated regularly.

4.2 Quality Assessment

At the time of the last assessment in 2023, the Quarterly SPS received a rating of ‘6’.

5. Relevance

This section is about the degree to which the statistical product meets user needs in both coverage and content.

Analysis (Tri-Service) frequently meet with customers within the Department to discuss data, results, interpretation and any changes to requirements. They also seek feedback from a wider range of internal and external customers. A key use of these statistics is to allow the Department and the public to assess how the Department is progressing under FR20, which is a top level Departmental programme.

We have made our own assessment of what these statistics could be used for using the categorisation in the UKSA paper The Use Made of Statistics.

We believe the statistics could be used as follows: -

i. Informing the general public’s choices:
a. about the performance of government and public bodies

ii. Government decision making about policies, and associated decisions about related programmes and projects:
b. policy monitoring

The underlying data also allow for:

iii. Government decision making about policies, and associated decisions about related programmes and projects:
c. policy making

iv. Facilitating academic research.

The Service Personnel Report should be used as the authoritative source of reserves strengths and flows statistics.

The MOD has recently consulted on changes to the definition of Army trained strength and the resultant impact it will have on Analysis (Tri-Service) publications and a consultation response were published on 7 November 2016. Changes have been implemented into Monthly Service Personnel Statistics from the 1 October 2016 publication onwards.

A formal consultation on Changes to MOD Armed Forces Personnel Statistics ran between 20 March to 16 April 2015 and 27 May to 18 June 2015. This was following an internal review of MOD Tri-Service publications content and sought further user views on proposed changes to publications.

Detailed information on previous consultations can be found via the National Archives

Users are also encouraged to provide feedback on statistics produced by Analysis (Tri-Service) and also to sign up to the mailing list for their publication of interest, to receive updates to the statistics or to be made aware of any changes: Analysis-Tri-Service@mod.gov.uk

The principal customers for the Tri-Service publications are within the People area of the Ministry of Defence. They are used to inform and measure Service personnel strategy in areas such as pay & allowances and overall troop numbers, and in particular the Future Reserves 2020 Programme (FR20). This product is also used to answer parliamentary questions and Freedom of Information requests. The publications are also used to inform the monthly Defence Board Management Information.

From 2013, reserve strengths and FR20 population strengths and flows information were added to the Quarterly Personnel Report due to the increased attention on reserve personnel in the media and public.

In 2013 TSP7 Reserve Forces and Cadets publication was re-developed in consultation with internal users and suppliers to ensure that it reflected the correct force structures and therefore could be used to monitor the Department’s progress against FR20. Information on the population most relevant to the FR20 key personnel targets was added – including the definition of that population and information on how many have completed training. In addition, a greater range of detail on reserve personnel was added, including age and ethnicity, to provide further background information on these forces to help inform policy.

From 2015 Reserves statistics are being reported on a quarterly basis in the Service Personnel Report. This increase in frequency further reflects the increased public focus on the reserve forces. In addition to this, Reserves diversity statistics previously reported in TSP 7 Reserve Forces and Cadets were moved to the Diversity Statistics publication.

Data availability is not complete for dates prior to April 2012 due to the necessary changes made to reflect modern force structures and the fact that the Department has not retained some information (i.e. Naval Service reserves data and some ex-Regular reserves data). There is no possibility of restoring the whole-time series.

Monthly extracts of strengths from JPA were retained from 1 April 2012 for the Army Reserve and 1 October 2012 for the Maritime Reserve and RAF Reserves. It is therefore not possible to report Future Reserves 2020 flows prior to this period.

6. Accuracy and Reliability

This section is about the differences between the estimates and the unknown true values.

6.1 Overall Accuracy

All personnel in the Regular Armed Forces must be recorded on JPA in order for them to receive their pay, and this is also the case for the vast majority of volunteer reserves. (Although for a small number this may not be the case). There is anecdotal evidence that records can take some time to be updated, although the Department has committed resources to ensuring that JPA is brought and kept up to date in each of the three Services. The data on the overall numbers on volunteer reserves is therefore considered to be reasonably accurate.

The Department has devoted resources at various levels to improving the quality and coverage of volunteer reserves data on JPA over the previous few years. This work has resulted in greater confidence in the statistics published in this report, and in its expansion to include information that was not published before 2013 (e.g. Trained status for volunteer reserves.)

Monthly datasets are passed through a range of automatic and manual validation and editing routines in order to make the key fields as accurate as possible, often drawing upon alternative data sources. Analysis (Tri-Service) dedicated reserve forces analysts have worked with producers to ensure that information is recorded and processed in line with agreed rules and definitions, and that data are retained and stored appropriately for statistical purposes. Analysis (Tri-Service) monitors data and outputs and will query apparent anomalies with producers.

There remain variations in quality which are partly due to differences in the recording of information - some key information is required for managing individuals, whereas other information is left to the individual to complete through a self-service tool. This is believed to be a particular problem for reservists, whose attendance at ongoing training is intermittent, and in many cases at locations where access to the system is difficult. This may impact the coverage of certain fields such as ethnic origin and nationality. Analysis (Tri-Service) monitors coverage in these fields and will only publish figures where coverage is above an appropriate threshold.

There is also a reasonable amount of late reporting which can adversely impact the statistics, especially for areas such as exits and changes to trained status. Obtaining the extract on the sixth calendar day and then calculating the strength at the first of the month overcomes some of this late reporting.

Another source of variation in data quality is the development and use of standalone systems (i.e. outside the JPA system), and manual recording of personnel data within some units particularly affecting the data between 2007 and 2012. For this reason, Naval Service Volunteer Reserve data up to and including April 2012 are considered estimates and are likely to remain so as there is no alternative data source. During 2013, considerable effort was made to use JPA as the primary source of personnel management information with the result that all data for volunteer and regular reserve personnel are now being sourced from JPA.

6.2 Data Revisions

Data revisions are handled in accordance with the MOD’s Official Statistics Revisions and Corrections Policy.

There were no revisions to the Quarterly Service Personnel Statistics, and Bi-Annual Diversity Statistics Publications around the time this Background Quality Report was last updated.

7. Timeliness and Punctuality

This section reports on the time gap between publication and the reference period (timeliness) and the gap between planned and actual publication dates (punctuality).

7.1 Timeliness

The quarterly extracts are taken on the sixth calendar day. The editing and production process usually takes around 2 weeks at the single Service level. It then takes a further 2-4 weeks to compile these data at a tri-Service level.

7.2 Punctuality

The following table provides an example of the timeline for 1 April 2024 Statistics.

Publication	Situation Date	Publication Date
Service Personnel Statistics	1 April 24	30 May 24

Historic and planned publication dates can be found on the Publication Release Dates section of the GOV.UK Statistics at MOD webpage and on the UK National Statistics Publication Hub

8. Coherence and Comparability

This section examines: the degree to which data that are derived from different sources or methods, but refer to the same topic, are similar (coherence); and the degree to which data can be compared over time and domain (comparability).

The Analysis (Tri-Service) statistics on UK Reserve Forces are the definitive personnel statistics in the MOD. Volunteer reserve statistics broken down by reserve type, trained status and officer / other rank are published quarterly in the Service Personnel Report. There are no other publicly available regular publications on the numbers of UK Reserve Forces with which to ensure coherence. Within the MOD direct queries of the Joint Personnel Administration system will produce markedly different numbers due to timing and quality issues.

The UK Reserve Forces personnel statistics are not always directly comparable with other countries’ statistics due to definitional differences in what constitutes a Reserve Force.

Annual editions of UK Defence Statistics since 1992 and historic Tri-Service publications back to 2001 are available at Statistics at MOD by following the link to “archived statistics”. The total number of Service personnel are comparable across time but the breakdowns are generally not comparable due to structural changes to the physical and financial structures of the MOD. The introduction of JPA across 2006/07 also impacted the statistics, reducing availability, accuracy and coverage due to a lack of investment in JPA for reserve personnel, as the Regular forces were prioritised. Work during 2012 and 13, as outlined above, resulted in changes to the statistics, both in data processing and definitions. Analysis (Tri-Service) has endeavoured to match historical data to the current definitions; where this has not been possible the tables are marked with a break in series.

9. Accessibility and Clarity

This section reports on: the ease with which users are able to access the data, the format in which the data are available, and the availability of supporting information (accessibility); and the quality and sufficiency of the metadata, illustrations and accompanying advice (clarity).

The reports are published at Statistics at MOD and are currently available in Excel spreadsheet and PDF format. They can be found by first following the “statistics by topic” link and then under the “Personnel statistics” heading. They can also be accessed via the Statistics release calendar or through an internet search engine such as Google.

10. Trade-offs between Output Quality Components

This section reports the extent to which different aspects of quality are balanced against each other

The main trade-off is between timeliness and quality. To ensure statistics are timely the editing and validation process is restricted to around three weeks. We do not have the resources to investigate further so we publish to a level that we feel is appropriate. Self-reported data are most often published as-is.

Due to the nature of the reserve forces as outlined above, the data are unlikely to be as robust as that for their regular counterparts. For example, information on whether individuals are considered trained or not is wholly reliant on Unit Admins updating the relevant data in a correct and timely fashion. Great effort has been made by the Department to educate Unit Admin staff, however they are often volunteer reservists themselves and subject to time and access pressures. The information is published acknowledging that it may never be 100% accurate but it represents the best information available, and there has been considerable improvement since 2012.

11. Cost and Respondent Burden

This section is about the effectiveness, efficiency and economy of the statistical output.

DS has four branches dedicated to producing information relating to personnel and providing analysis and advice. However, the majority of time is spent on adding value through analysing, forecasting and answering ad hoc queries rather than producing the National Statistics per se. Some of Analysis (Tri-Service) other branches (there are approximately 15) provide support to the manpower branches. 3x FTE statistical officers (1 of which is Army-focused) are currently dedicated to producing and compiling reserve forces information.

There is some respondent burden as not all data are automatically obtained from administrative systems.

12. Confidentiality and Security

This section is about the procedures and policy used to ensure sound confidentiality, security and transparent practices.

12.1 Confidentiality – Policy and Data Treatment

Disclosure control is conducted on all statistical information provided by the MOD to safeguard the confidentiality of individuals.

All published outputs are counts of individuals in particular groupings. Where there are possible disclosure issues in reporting protected characteristics, outputs are rounded according to Analysis (Tri-Service) rounding policy, which prevents disclosure of information on individuals.

12.2 Transparency

The reports provide commentary on the key features of the outputs and identify any issues or caveats to the data. This quality report provides further information on the method, production process and quality of the output.

12.3 Security

All staff involved in the production process have signed the Data Protection Act; all MOD, Civil Service and data protection regulations are adhered to. The data is stored, accessed and analysed using the MOD’s restricted network and IT systems, and the access to raw data is password protected.

The Analysis (Tri-Service) website can be accessed here: Statistics at MOD

Updated: 11 October 2024

Background Quality Report: MoD Sponsored Cadet Force Statistics

1. Contact

This section provides details on the Analysis (Tri-Service) Head of Branch is the Responsible Statistician for these statistics.

Analysis (Tri-Service)
Ministry of Defence
Floor 3 Zone M
Main Building, Whitehall
London SW1A 2HB

E-mail: Analysis-Tri-Hd@mod.gov.uk

Website: Statistics at MOD

2. Introduction & Statistical Presentation

The Ministry of Defence (MOD) publishes a wide range of personnel statistics. The main purpose of these statistics is; to inform policy and decision making within the Department, to measure the performance of the Ministry of Defence against Government and Parliament targets, and also to inform general debate in Government, Parliament and the wider public.

This background quality report covers the cadet forces statistics published on the Analysis (Tri-Service) website on GOV.UK: MOD Sponsored Cadet Forces Statistics

Historic reports can be found on the archived Analysis (Tri-Service) website on the National Archives site

3. Statistical Processing

3.1 Source Data

Personnel statistics are derived from legacy single Service administration systems used to produce statistics.

Cadet data are provided to Analysis (Tri-Service) Tri Service by Reserve Forces and Cadets and sourced from the Cadet Management Information System.

3.2 Frequency of data collection

Extracts are taken from Cadet Management Information annually.

3.3 Data collection

The extracts are taken six calendar days after the end of April and the situation as at the first of April is calculated. This ensures most late-reporting is captured.

3.4 Data Validation

The data goes through a series of automatic validation checks based on previous corrections.

The data is then made available to experts in each service where they undertake a range of checks using their expert knowledge and experience as well as data obtained from other sources within the Department.

These tables undergo several rounds of checking and scrutiny to ensure the outputs are accurate and consistent, before being published on an annual basis.

3.5 Data Compilation

Once the data is confirmed as being accurate the database is queried to produce the range of tables published. These tables undergo several layers of scrutiny to ensure the outputs are accurate and consistent.

These statistics are primarily counts of strengths (numbers of personnel at the 1st of April), broken down into the following populations / characteristics of interest:

• Community Cadets or Combined Cadet Force
• Service (Royal Navy/Royal Marines, Army, and Royal Air Force)
• Cadets and Cadet Forces Adult Volunteers
• Gender
• Age

4. Quality Management

This section will briefly describe the overarching processes in place to manage quality e.g. annual risk assessments, and offer the opportunity to outline results of recent quality assessments.

4.1 Quality Assurance

The MOD’s quality management process for Official Statistics consists of three elements: (1) Regularly monitoring and assessing quality risk via an annual assessment; (2) Providing a mechanism for reporting and reviewing revisions/corrections to Official Statistics; (3) Ensuring BQRs are publishing alongside reports and are updated regularly.

4.2 Quality Assessment

At the time of the last assessment 2023, the MOD Sponsored Cadet Forces publication received a rating of ‘3’.

5. Relevance

This section is about the degree to which the statistical product meets user needs in both coverage and content.

Analysis (Tri-Service) frequently meets with customers within the Department to discuss data, results, interpretation, and any changes to requirements. They also seek feedback from a wider range of internal and external customers.

We have made our own assessment of what these statistics could be used for using the categorisation in the UKSA paper The Use Made of Statistics.

We believe the statistics could be used as follows: -

i. Informing the general public’s choices:
a. about the performance of government and public bodies

ii. Government decision making about policies, and associated decisions about related programmes and projects:
b. policy monitoring

The underlying data also allow for:

iii. Government decision making about policies, and associated decisions about related programmes and projects:
c. policy making

iv. Facilitating academic research.

Detailed information on previous consultations can be found via the National Archives

Users are also encouraged to provide feedback on statistics produced by Analysis (Tri-Service) and also to sign up to the mailing list for their publication of interest, to receive updates to the statistics or to be made aware of any changes: Analysis-Tri-Service@mod.gov.uk

The principal stakeholders for these statistics are within the Chief of Defence Personnel area of the Ministry of Defence. They are also used to answer parliamentary questions and Freedom of Information requests.

For detail on pre-release access to Analysis (Tri-Service) publications please see the Analysis (Tri-Service) pre-release access list for the most up to date list of roles receiving pre-release access.

People in the roles with access receive pre-release access to the publication up to 24 hours in advance of publication.

These statistics were originally developed in close consultation with stakeholders. The Quarterly, Monthly and Annual Personnel Reports and Bulletins were reviewed by the UK Statistics Authority (UKSA) in 2013 to ensure they met the requirements of a National Statistic. This review led to the inclusion of more commentary and where possible references to relevant policy to provide greater context to the figures reported.

There are no known unmet user needs.

6. Accuracy and Reliability

This section is about the differences between the estimates and the unknown true values.

6.1 Overall Acurracy

Regular feedback ensures Analysis (Tri-Service) staff are kept abreast of any changes or potential issues with the data and statistics, which is fed into the data validation and editing process.

6.1 Data Revisions

Data revisions are handled in accordance with the MOD’s Official Statistics Revisions and Corrections Policy.

There were no revisions to the MoD Sponsored Cadet Force Statistics Publication around the time this Background Quality Report was last updated.

7. Timeliness and Punctuality

This section reports on the time gap between publication and the reference period (timeliness) and the gap between planned and actual publication dates (punctuality).

The annual extracts are taken on the first working day of April. The editing and production process usually takes about three weeks at the single Service level. It then takes a further four weeks to compile and publish these data at a Tri-Service level and publish as National Statistics.

Historic and planned publication dates can be found on the UK National Statistics Publication release list

In 2017, the report was delayed from May until July to ensure the quality of the publication.

In 2020 and 2021, the report was delayed from May until June as a precautionary measure to mitigate the impact of COVID-19.

Historic and planned publication dates can be found at statistics at MOD and on the UK National Statistics Publication Hub.

8. Coherence and Comparability

This section examines: the degree to which data that are derived from different sources or methods, but refer to the same topic, are similar (coherence); and the degree to which data can be compared over time and domain (comparability).

Analysis (Tri-Service) published statistics on UK Armed Forces are the definitive personnel statistics in the MOD. There are no other available data sets which to ensure coherence.

Annual editions of UK Defence Statistics compendium dating back to 1992, plus historic Tri-Service publication TSP07 dating back to 2002, are available in the National Archives.

9. Accessibility and Clarity

This section reports on: the ease with which users are able to access the data, the format in which the data are available, and the availability of supporting information (accessibility); and the quality and sufficiency of the metadata, illustrations and accompanying advice (clarity).

Current publications consist of detailed Excel tables containing a historic time-series of statistics, a PDF report containing commentary, graphs and tables on trends in the statistics and an accessible HTML version of the publication. The commentary in our reports identifies and analyses the key changes in the data and provides summary statistics and policy context. Graphs, tables and other data visualisation methods are used to further explain these trends.

Previous Analysis (Tri-Service) personnel reports are published on GOV.UK and are available as PDFs or Excel value copies. Other formats may be possible for Analysis (Tri-Service) to produce on request.

All Analysis (Tri-Service) publications that use these data can be found under the “Military” and “Combined military and civilian” sections under the “Personnel statistics” heading on the statistics by topic section of the MOD National and Official Statistics by topic webpage

They can also be accessed via the Statistics release calendar.

Copies of the reports are also placed in the House of Commons library.

10. Trade-offs between Output Quality Components

This section reports the extent to which different aspects of quality are balanced against each other.

The main trade-off is between timeliness and quality. To ensure statistics are timely the editing and validation process is restricted to around two weeks and a significant amount of automatic editing is utilised. Spending more time investigating every suspect individual personnel record could marginally improve quality at a detailed trade/rank level but is unlikely to impact the aggregated statistics published in our reports.

The COVID-19 pandemic resulted in the suspension of face-to-face cadet activity in 2020 and 2021, which severely disrupted engagement with Cadets and Adult Volunteers. This directly impacted the recording and processing of applications to join each respective Cadet Force. Some administrative processes are likely to have been delayed due to COVID-19.

11. Cost and Respondent Burden

This section is about the effectiveness, efficiency and economy of the statistical output.

Analysis (Tri-Service) has four branches dedicated to producing information relating to manpower and providing analysis and advice, the majority of time is spent on adding value through analysing, forecasting and answering ad-hoc enquiries as well as producing the National Statistics.

There is very little respondent burden as the majority of the data is automatically obtained from administrative systems. However, this is supplemented with small amounts of data as well as input from other areas within the MOD.

12. Confidentiality, Transparency and Security

This section is about the procedures and policy used to ensure sound confidentiality, security and transparent practices.

12.1 Confidentiality- Data Treatment

All published outputs are counts of individuals in particular groupings. Where there are possible disclosure issues in reporting protected characteristics, outputs are rounded according to Analysis (Tri-Service) rounding policy, which prevents disclosure of information on individuals.

Disclosure control is conducted on all statistical information provided by the MOD to safeguard the confidentiality of individuals.

12.2 Transparency

The reports provide commentary on the key features of the outputs and identify any issues or caveats to the data. This quality report provides further information on the method, production process and quality of the output.

12.3 Security

All staff involved in the statistical production process adhere to all MOD, Civil Service and data protection regulations. The data is stored, accessed and analysed using the MOD’s restricted network and IT systems, and access to raw data is password protected and approval for access is granted only by the Head of Personnel Statistics.

The Analysis (Tri-Service) website can be accessed at Statistics at MOD

Updated: 11 October 2024

Background Quality Report: Armed Forces Application Statistics

1. Contact

This section provides details on the Analysis (Tri-Service) Head of Branch is the Responsible Statistician for these statistics.

Analysis (Tri-Service)
Ministry of Defence
Floor 3 Zone M
Main Building, Whitehall
London SW1A 2HB

E-mail: Analysis-Tri-Hd@mod.gov.uk

Website: Statistics at MOD

2. Introduction & Statistical Presentation

2.1 Overview

Analysis (Tri-Service) publishes a large range of Armed Forces (AF) personnel statistics, mainly to inform policy and decision making within the Department. The statistics are also used to measure performance against MOD, Government and Parliament targets and to inform general debate in Government, Parliament and the wider public.

This background quality report covers the Official Statistics specifically concerning the number of applications to serve in the AF received by each of the three Services. Application statistics were published quarterly until a new recruitment system, namely the Defence Recruitment System (DRS), was introduced. Application data since 1 October 2017 has not been available as an official statistic. We have verified and applied quality assurance to the received data, and data at quarterly points starting from 1 July 2019 is available in the Service Personnel Publication.

For Navy and RAF, the DRS closed in December 2021, the change over to the new application system, the Recruitment IT System (RITS) resulted in a loss of the system for 10-12 weeks. For Navy, the change over to the new application system may have resulted in some applications being double counted. For RAF only the applications being taken forward were migrated to the new system, and therefore there is a break in the time series where data is unavailable between 1 January 2022 and 1 January 2023. Army continue to use DRS, however experienced a temporary loss of the application system from mid-March 2022 to late May 2022.

The application is the first formal submission for scrutiny and it differs from “applicant” since an applicant may submit more than one application. Whilst application counts for each service are based on online applications submitted by an individual and accepted by DRS/RITS , work is ongoing to verify that application processes and definitions are consistent and we would recommend that numbers should not be aggregated to show Armed Forces totals. This will be discussed in more detail later in this section.

3. Statistical Processing

3.1 Source Data

The DRS (Army) and RITS (Navy and RAF) is where recruitment data is currently held and is used to support the Armed Forces recruitment process.

3.2 Frequency of Data Collection

Record level data is provided on a quarterly basis to Analysis Tri-Service by the single Services’ (sS) recruitment teams from DRS/RITS.

3.3 Data Collection

Record level data provided by the sS recruitment teams are stored separately from the live database to provide a time series of historical data.

3.4 Data Validation

Analysis Tri-Service verifies, processes and collates the data into the format required for publication in accordance with UK Statistics Authority (UKSA) guidelines

3.5 Data Compilation

DRS and RITS is an administrative data source since the data it holds were not primarily collected with statistical purposes in mind. The National Statistician’s Office (NSO) provides guiding principles around the use of administrative data for statistical purposes[^1], with a particular focus on the statistician’s role in assuring and communicating the quality of administrative data used to produce official statistics. The guidance aims to ensure the requirements of the Code of Practice for Official Statistics, and the expectations of users, are met. It references the requirements of Protocol 3 of the Code of Practice, which specifically addresses the use of administrative sources for statistical purposes.

NSO guidance has been adhered to in the assessment of the data, and in subsequent work with data suppliers with regard to data validation. Further details regarding the work conducted can be found in the “Accuracy and Reliability” section below. Due to the subtle differences in the recruitment application processes, sS numbers should not be aggregated to show total AF applications. The table below sets out the differences in the three Service’s approach:

The statistics are counts of the number of applications to serve in the AF received by each of the three Services; providing a breakdown by Service, Regular and Volunteer Reserve Forces, and by Officer and Other Rank.

Application Definitions:

RN/RM: An application is defined as an online application submitted by an individual and accepted by RITS.

Army: An application is an online application submitted by an individual and accepted by Defence Recruitment System (DRS). For an application to be conducted the contact needs to have successfully registered on the Army website. Registrations are recorded by the RRP.

RAF: An application is defined as an online application submitted by an individual and accepted by RITS.

4. Quality Management

This section will briefly describe the overarching processes in place to manage quality e.g. annual risk assessments, and offer the opportunity to outline results of recent quality assessments.

4.1 Quality Assurance

The MOD’s quality management process for Official Statistics consists of three elements: (1) Regularly monitoring and assessing quality risk via an annual assessment; (2) Providing a mechanism for reporting and reviewing revisions/corrections to Official Statistics; (3) Ensuring BQRs are publishing alongside reports and are updated regularly.

4.2 Quality Assessment

At the time of the last Quality Assessment in 2023, the Quarterly SPS received a rating of ‘6’.

5. Relevance

This section is about the degree to which the statistical product meets user needs in both coverage and content.

Analysis (Tri-Service) frequently meets with customers within the Department to discuss data, results, interpretation and any changes to requirements. They also seek feedback from a wider range of internal and external customers.

Users are also encouraged to provide feedback on Analysis Tri-Service through the annual consultation meetings.

Due to the high-profile nature of application statistics, this information serves the need of the Department to have consistent, reliable Official Statistics on which to base its press releases and other queries.

We have made our own assessment of what these statistics could be used for using the categorisation in the UKSA paper The Use Made of Statistics. We believe the statistics could be used as follows: -

i. Informing the general public’s choices:
a. about the performance of government and public bodies

ii. Government decision making about policies, and associated decisions about related programmes and projects:
b. policy monitoring

The underlying data also allow for:

iii. Government decision making about policies, and associated decisions about related programmes and projects:
c. policy making

iv. Facilitating academic research.

6. Accuracy and Reliability

This section is about the differences between the estimates and the unknown true values.

6.1 Overall Accuracy

Initially, three stages of recruitment were identified during the recruitment process and data scoping phase. These were: initial “contacts” made by individuals wishing to garner information about joining the AF; formal “applications” submitted to join the AF; and “potential entrants”, whom have passed the selection criteria to join the AF and have received an offer of employment.

Subsequently it was recognised that there is often no distinct contact step since candidates may go directly to the application stage, and applications submitted on-line cannot be linked back to a contact records. It is, therefore, not possible to identify a complete cohort of “contacts”. Also information pertaining to potential entrants is not generally collected by the single services. However, gathering applications data remained a feasible and appropriate recommendation.

The quality of application data was assessed in terms of fitness for purpose and whether the conditions required to be produced as Official Statistics were met.

Data are collected on DRS/RITS to manage the recruitment of the AF. All new entrants are required to formally apply and complete various stages of the recruitment process, and DRS/RITS is the live system which collates this information. The overall number of applications received is, therefore, judged to be sufficiently accurate, although in some circumstances manual input is required, and some time-lags are apparent.

The single Service Recruiting Teams have checked and verified that the applications data collated by Analysis Tri-Service is consistent and accurate with their internal products.

At the macro level, the existence and potential for data errors is currently assessed as not having a disproportionate impact on the quality of the resulting statistics. There is a potential for duplicate applications to be present in the published statistics as all applications have been counted, and multiple applications from the same applicant are accepted by the system. Applications used to test the application system have been removed as they are not true applications.

With regard to incentive and opportunity for distorting the data supplied; since DRS/RITS is maintained for operational purposes, with the statistical use a secondary benefit; and the data is extracted directly from DRS/RITS via management information interfaces, this is considered to be minimal.

Once the sS recruitment teams have applied their specialist knowledge to extract the data in accordance with their specific definitions of an application, Analysis Tri-Service independently processes and collates the data into the format required for publication in accordance with UKSA guidelines.

6.2 Data Revisions

Data revisions are handled in accordance with the MOD’s Official Statistics Revisions and Corrections Policy.

There were no revisions to the Quaterly Service Personnel Statistics around the time this Background Quality Report was last updated.

7. Timeliness and Punctuality

This section reports on the time gap between publication and the reference period (timeliness) and the gap between planned and actual publication dates (punctuality).

The sS provide record level data to Analysis Tri-Service on a quarterly basis, while each of the sS receive their extracts on a monthly basis from DRS.

The verification, processing and collating exercise takes Analysis Tri-Service approximately two weeks to complete. The statistics are published in the Service Personnel Statistics publication at the quarterly points. In the Service Personnel Statistics publication there is a reporting lag of 1 quarter. There is a break in the time series between 1 October 2017 and 1 July 2018 due to the change from TAFMIS to DRS and due to the need to ensure consistency of the start date for reintroduced data between the single services.

Navy and RAF applications figures were unavailable between 1 January 2022 and 1 January 2023 due to migrating the data from the DRS to the system RITS which required extensive quality control and other validation. Army applications figures were unavailable between 1 April 2022 and 1 January 2023 due to issues with the supply of the underlying data. Unavailable applications figures during this period were added in the 1 July 2023 of the SPS, apart for the RAF where applications being taken forward were only migrated to RITS hence there is a break in time series where data is unavailable.

8. Coherence and Comparability

This section examines: the degree to which data that are derived from different sources or methods, but refer to the same topic, are similar (coherence); and the degree to which data can be compared over time and domain (comparability).

Analysis (Tri-Service) teams are the definitive source of UK AF statistics in the MOD. There are no other publicly available regular publications on the numbers of applications to serve in the AF received by each of the three Services with which to ensure coherence. However this data may be publicly available in the responses to Parliamentary Questions and Freedom of Information Requests.

Due to the subtle differences in the recruitment application processes, single Service numbers should not be aggregated to show total AF applications. Further details about the different definitions can be found in the “Methodology and Production” section above.

In addition, the number of applications received does not directly relate to the intake figures Analysis Tri-Service compiles since there is a time-lag between an application being received and an individual successfully being taken onto untrained strength.

9. Accessibility and Clarity

This section reports on: the ease with which users are able to access the data, the format in which the data are available, and the availability of supporting information (accessibility); and the quality and sufficiency of the metadata, illustrations and accompanying advice (clarity).

The commentary reports were first published on 13th August 2015 and are available in pdf/HTML format; detailed tables of time series data in Excel format can be found via the same link.

10. Trade-offs between Output Quality Components

This section reports the extent to which different aspects of quality are balanced against each other.

Trade-offs exist between timeliness and quality, plus resource constraints in the training delivery organisations mean it is not always possible to correct known data issues.

To ensure statistics are timely, the editing and validation process is restricted to around two weeks. Spending more time investigating every suspect individual personnel record could marginally improve quality at a detailed trade/rank level but is unlikely to impact the aggregated statistics published. Data may include duplicate applications as all valid applications based on the definitions provided are counted. Duplicate applications are defined as multiple applications from a single applicant, intentional or otherwise. Data cleansing in regard to applications submitted to test the system has been undertaken and identified applications have been removed.

11. Cost and Respondent Burden

This section is about the effectiveness, efficiency and economy of the statistical output.

Analysis Directorate has four branches dedicated to producing information relating to personnel and providing analysis and advice, the majority of time is spent on adding value through analysing, forecasting and answering ad-hoc enquiries as well as producing the National Statistics.

There is very little respondent burden as the majority of the data is automatically obtained from administrative systems. However, this is supplemented with small amounts of data as well as input from other areas within the MOD.

12. Confidentiality, Transparency and Security

This section is about the procedures and policy used to ensure sound confidentiality, security and transparent practices.

12.1 Confidentiality

All published outputs are counts of individuals in particular groupings. The outputs are rounded according to Analysis Tri-Service’s rounding policy which reflects the degree of accuracy of the outputs and prevents disclosure of information on individuals. See the rounding policy on the Analysis Tri-Service policies page here: MOD statistics: policies

12.2 Transparency

The reports provide commentary on the key features of the outputs and identify any issues or caveats to the data. This quality report provides further information on the method, production process and quality of the output.

12.3 Security

All staff involved in the statistical production process adhere to all MOD, Civil Service and data protection regulations. The data is stored, accessed and analysed using the MOD’s restricted network and IT systems, and access to raw data is password protected and approval for access is granted only by the Head of Personnel Statistics.

The Analysis (Tri-Service) website can be accessed here: Statistics at MOD

Updated: 11 October 2024

UK Regular Forces and Civilian Location Statistics

1. Contact

This section provides details on the Analysis (Tri-Service) Head of Branch is the Responsible Statistician for these statistics.

Contact details are:

Analysis (Tri-Service)
Ministry of Defence
Floor 3 Zone M
Main Building, Whitehall
London SW1A 2HB

E-mail: Analysis-Tri-Hd@mod.gov.uk

Website: Statistics at MOD

2. Introduction & Statistical Presentation

The Ministry of Defence (MOD) publishes a wide range of Armed Forces personnel statistics. The main purpose of these statistics is to inform policy and decision making within the Department, to measure the performance of the Ministry of Defence against Government and Parliament targets, and to inform general debate in Government, Parliament and the wider public.

This background quality report covers the Annual Location Statistics (ALS), which gives the global strength of UK Regular Forces and MOD Civilian personnel statistics by stationed location, and the annual intake by Parliamentary Constituency into the UK Regular Forces published on GOV.UK.

The publication we produce which contain statistics on UK Full-time Armed Forces personnel is:

Annual Location Statistics (ALS)

The ALS shows the strength of the UK Regular Forces and MOD Civilians by stationed locations as at the first day of April for each financial year. Full Time Reserve Service (FTRS) personnel, Gurkhas & mobilised reservists are excluded from the data. These statistics are broken down into the following populations of interest:

• Service (Naval Service, Army, and Royal Air Force) - officer and other ranks.
• MOD Civilians – Core (Non-Industrial and Industrial), Trading Funds and Executive Agencies and the global locations of Locally Engaged Civilians (LEC) personnel.

The ALS also shows Intake into the UK Regular Forces by Parliamentary Constituency in the last 12 month period preceding the first day of April for each financial year.

The ALS in its current form was first published in July 2011. It shows the global strength of UK Regular Forces and MOD Civilians by stationed locations. Following a request in Defence Orals in April 2020, data on the Parliamentary Constituency of recruits (intake) is now included in these statistics, beginning with the April 2021 release, The stationed location statistics were previously published quarterly as Quarterly Location Statistics (QLS) until July 2018, when it became an annual publication. Prior to July 2011, the Tri-Service Publication 10 (TSP10) was produced showing the global strength of UK Regular Forces only. The TSP10 was first produced in July 1994 as a publication to show the strength of the UK Regular Forces by stationed locations covering only the UK. From April 2007, this was merged with TSP6 to show global strengths of the UK Regular Forces by stationed locations.

See the summary of the Consultation on Reformatting the Armed Forces Statistics for further details.

An index of previous Quarterly Location Statistics (QLS) published prior to 2018 can be found on GOV.UK:

3. Statistical Processing

3.1 Source data

• The UK Regular Forces statistics are principally derived from the Department’s Joint Personnel Administration (JPA) system, which is used for the administration of all Armed Forces personnel, supplemented by information from single Services’ management systems and other centrally managed databases. Prior to the introduction of JPA in 2006/07, legacy single Service administration systems were used to produce the statistics.
• Data for MOD Civilians are compiled from several sources.
• Data for civilians within MOD Main and two Trading Fund and Executive Agencies (Defence Equipment & Support (DE&S) and Submarine Delivery Agency (SDA)) are derived from the MOD’s MyHR personnel system. MyHR replaced Human Resources Management System (HRMS) in February 2022.
• Data for civilians within the remaining Executive Agencies (UK Hydrographic Office (UKHO) and Defence Science & Technology Laboratory (DSTL) and Defence Electronics Components Agency (DECA)) are derived from the executive agencies HR systems. At 1 April 2024, DECA formally transferred within DE&S and data was therefore is longer collected separately.
• Royal Fleet Auxiliary data are sourced directly from their HR system ‘Magellan’.
• Locally engaged civilians (LEC) data are provided by the main budgetary area of the MOD responsible for them.
• Postcode data on recruits joining the Armed Forces is held by the Defence Recruiting System (DRS) for the Army and held by the RITS system for Navy and Air (prior to 2022, it was held by the Defence Recruiting System (DRS)).

3.2 and 3.3 Data Collection and Frequency

• For UK Regular Forces data, Extracts are taken from JPA each month and stored on separate databases to form a time series. The extracts are taken six calendar days after the end of the month and the situation as at the first of the month is calculated. This ensures most late-reporting is captured.
• Data for MOD Main, DE&S and SDA is sourced monthly from MyHR system (previously HRMS prior to February 2022). This is provided by Defence Business Support (DBS), the organisation that owns the data. The data is taken from MyHR on the first calendar day and made available to the production team within 10 working days. Equivalent monthly data sets from the Executive Agencies are provided monthly These data are processed and stored on a centralised data base system and accessed by authorised users via a front-end user interface system. The validation takes around one week.
• Royal Fleet Auxiliary data are sourced directly quarterly from their HR system ‘Magellan’ on a data file formatted and uploaded to a data interface tool.
• LEC data is sourced quarterly and held separately on a dedicated excel spreadsheet. This allows it to be combined with other MOD Civilian data outputs to produce departmental level data at required levels of detail. In the event of data being unavailable, the appropriate figures from the previous quarter point are carried forward as estimates. These estimates are not revised once actual figures become available, as late deliveries of data are typically from small TLBs and the impact is minimal. However, if at a later date validation errors of a substantial impact are revealed, then figures may be revised.
• Postcode data for Intake are obtained from the RITS (Navy and Air) and DRS (Army) live databases followed by data validation and processing, which is performed by the single Services analysis teams (Analysis Navy, Analysis Army and Analysis Air). They obtain, for the 12 months period before the start of the latest financial year, the postcodes recorded in the recruits’ contact information at time of application. These postcodes are then used to identify the Parliamentary Constituency of the recruits at the time of application.

3.4 Data validation

• UK Regular Forces data goes through a series of automatic validation checks and edits to ensure the basic quality of the data and a series of derived fields are calculated. The data is then made available to MOD single Services analysis teams. They undertake a wide range of validation checks and implement specialist editing rules using their expert knowledge and experience as well as data obtained from other sources within the Department.
• Data validation is conducted as part of the acceptance of the monthly extract prior to it being made available to the production team on a custom designed database. More detailed validation is then undertaken on the breakdowns of individual fields, and comparisons between the current and previous month’s figures. Unusual variations are identified and investigated to identify explanations/reasons for the changes. In instances where our investigations detect data issues Analysis Civilian liaise with DBS to correct the data. The validation process focuses on the areas where problems with the data have been detected in the past.
• RITS and DRS are not an administrative data source since the data it holds were not primarily collected with statistical purposes in mind. The National Statistician’s Office (NSO)3 provides guiding principles around the use of administrative data for statistical purposes, with a particular focus on the statistician’s role in assuring and communicating the quality of administrative data used to produce official statistics. The guidance aims to ensure the requirements of the Code of Practice for Official Statistics, and the expectations of users, are met. It references the requirements of Protocol 3 of the Code of Practice, which specifically addresses the use of administrative sources for statistical purposes.

NSO guidance has been adhered to in the assessment of the data, and in subsequent work with data suppliers about data validation. Further details regarding the work conducted can be found in the data compliance section below.

3.5 Data compilation

Once the data is confirmed as being accurate, they are used to produce the range of tables published. These tables undergo several layers of scrutiny to ensure the outputs are accurate and consistent. The results are rounded to the nearest 10 to reflect the degree of confidence we have in the numbers and to ensure small numbers do not disclose information on individuals. However, numbers ending in “5” are rounded to the nearest 20 to prevent systematic bias of always rounding these numbers up. Very small numbers between 1 and 5 are suppressed to prevent disclosure of information on individuals.

The UK Regular Forces statistics are headcounts of regular personnel, both trained and untrained, and are presented in the following breakdowns for each location: Navy, Army and RAF; officer and other ranks.

The published Civilian figures are counts of numbers (strengths) of civilian personnel for a range of categories. The strength figures are reported as Full Time Equivalent (FTE). This is preferable to headcount for civilian personnel as it enables fair comparison with Service figures, where working part-time does not occur, and provides a better indication of the person hours available and salary costs. FTE is calculated from the contractually agreed number of hours worked per week divided by the number of hours per week which constitute full-time for the grade and location (this varies according to whether Industrial or Non-Industrial grade, and whether on the London or National pay scale).

For Air and Navy data, the Parliamentary Constituency is identified from “contact” Postcode as recorded in RITS. However, for Army data, Parliamentary Constituency has been identified using a combination of postcode districts for individuals with partial postcode information and full postcodes for those with complete postcode details, based on the available data held in the DRS. This is then linked to the latest ONS geographical lookup tables.
Air and Navy data are produced using full “contact” Postcodes on intake and therefore provides a completely accurate intake by Constituency. Any Constituencies with no personnel recorded may have had no intake over the reported period for these two Services but this is not certain due to unknown values.

However, for the Army data in the financial years 2014/15 to 2021/22 only Postcode District is available and therefore used to derive Constituency. Postcode Districts can overlap Constituencies and therefore we have assigned personnel to the Constituency which has a majority of Postcodes associated with the relevant Postcode District. Two Constituencies, namely Dudley South and Northampton North, have no Postcode Districts where the majority of Postcodes fall in the Constituency, and so have no reported intake. It should be noted that this does not mean that no personnel have been recruited from these Constituencies, rather they cannot be assigned there due to the methodology used.

For the intake into the Army in the financial years 2021/22 to 2023/24, Officers’ Postcode data were unavailable, and so Officer data could not be broken down to Constituency level and have been included in the “Unknown” category. For Other Ranks, Parliamentary Constituency has been derived using a combination of postcode districts for individuals with partial postcode information and full postcodes for those with complete postcode details. All Postcode information has been obtained from DRS management information system, and the available full Postcode information has been obtained through the Recruitment and Training Pipeline Project (RTPP) information. RTPP is an ongoing project within the MOD Analysis Function aiming to streamline data on intake into the Armed Forces. Where the full Postcode is available, this has been used to assign personnel to a Constituency, otherwise, Constituency has been derived using the Postcode District only, as per the information held in DRS. Due to this, there could be instances where a Postcode District covers more than one Parliamentary Constituency. Where this occurs, personnel are assigned to the Parliamentary Constituency where the majority of a Postcode District lies.

The methodology is currently under review and is being revised to use full Postcodes for all three services for the next Annual Location Statistics, increasing the quality of the data produced.

4. Quality Management

This section will briefly describe the overarching processes in place to manage quality e.g. annual risk assessments, and offer the opportunity to outline results of recent quality assessments.

4.1 Quality Assurance

The MOD’s quality management process for Official Statistics consists of three elements: (1) Regularly monitoring and assessing quality risk via an annual assessment; (2) Providing a mechanism for reporting and reviewing revisions/corrections to Official Statistics; (3) Ensuring BQRs are publishing alongside reports and are updated regularly.

4.2 Quality Assessment

At the time of the last Quality Assessment in 2023, the Annual ALS received a rating of ‘2’.

5. Relevance

This section is about the degree to which the statistical product meets user needs in both coverage and content.

Analysis (Tri-Service) frequently meet with customers within the Department to discuss data, results, interpretation, and any changes to requirements. They also seek feedback from a wider range of internal and external customers.

There was a formal consultation of both internal and external users in April 2009 over the proposal to replace the former Tri-Service publications 10 (TSP10) with the QLS and related issues. See Consultation on Reformatting the Armed Forces Statistics on UK Government Web Archive for details. There was also a formal consultation for internal and external users on Analysis (Tri-Service) Annual Manpower Publications between November 2010 and March 2011. Following these consultations Analysis (Tri-Service) received no negative feedback from external bodies regarding changes to the publications.

We have made our own assessment of what these statistics could be used for using the categorisation in the UKSA paper The Use Made of Statistics.

We believe the statistics could be used as follows:

i.Informing the general public’s choices:
about the performance of government and public bodies

ii. Government decision making about policies, and associated decisions about related programmes and projects:
policy monitoring

The underlying data also allow for:

iii. Government decision making about policies, and associated decisions about related programmes and projects:
policy making

iv. Facilitating academic research.

The Annual Location Statistics should be used as the authoritative source of the statistics on the stationed location of UK Regular Forces and MOD Civilian personnel, and the Parliamentary Constituency of Recruits into the UK Regular Forces at time of application.

Users are also encouraged to provide feedback on statistics produced by Analysis (Tri-Service) and also to sign up to the mailing list for their publication of interest, to receive updates to the statistics or to be made aware of any changes: Analysis-Tri-Service@mod.gov.uk

The principal customers for the Tri-Service publications are within the People area of the Ministry of Defence. They are used to inform and measure Service personnel strategy in areas such as pay & allowances and overall troop numbers, and in particular the Future Reserves 2020 Programme (FR20). This product is also used to answer parliamentary questions and Freedom of Information requests.

The principal stakeholders for Tri-Service personnel statistics are within the Chief of Defence Personnel area of the Ministry of Defence. The statistics are used to inform and measure Service personnel strategy in areas such as pay & allowances and equality & diversity. They are also used to answer parliamentary questions and Freedom of Information requests. The information is also used to inform the internal monitoring and regular monthly reporting to the Defence Board.

For detail on pre-release access to Analysis (Tri-Service) publications please see the Analysis (Tri-Service) pre-release access list for the most up to date list of roles receiving pre-release access.

People in the roles with access receive pre-release access to the publication up to 24 hours in advance of publication.

The coverage of these statistics is close to, if not equal to 100% of all UK Regular Armed Forces personnel and MOD Civilians. There are no known unmet user needs.

6. Accuracy and Reliability

This section is about the differences between the estimates and the unknown true values.

6.1 Overall Quality

All personnel in the Regular Armed Forces must be recorded on JPA in order for them to receive their pay. Likewise, Civilian data is sourced from Human Resource data systems where personnel must be recorded. Therefore, the overall strength figures are accurate. However, more detailed breakdowns relying on the information recorded for each individual can be less accurate due to variable quality of the data entered for these different fields.

The variation in quality is partly due to key information required for managing individuals being recorded and updated in central systems, whereas other information is left to the individual to complete through a self-service tool.

The monthly datasets are passed through a range of automatic and manual validation and editing routines in order to make the key fields as accurate as possible, often drawing upon alternative data sources. A range of detailed breakdowns are produced and these are compared with previous month’s outputs and discrepancies are examined.

Regular feedback ensures Analysis (Tri-Service) staff are kept abreast of any changes or potential issues with the data and statistics, which is fed into the data validation and editing process.

Methodology documentation has been produced and is updated as necessary, and core products are produced and checked via automated processes, and standardised data sets allowing verification against historic outputs, as well as new data outputs for current periods.

Please see the following accuracy limitations:

• The definition of Defence Science & Technology Laboratory (DSTL) workforce was adjusted at 1 April 2024 to remove Alumni and Zero hours personnel which resulted in the decrease of around 100 employees.
• Defence Nuclear Organisation (DNO) is part of MOD Main and Submarine Delivery Agency (SDA) is an executive agency of the MOD. Prior to 1 April 2023, the two populations, Defence Nuclear Organisation (DNO) and Submarine Delivery Agency (SDA) were not separately identifiable for the purposes of producing Official Statistics. As the majority of the population were classified as administrative work for the SDA, the DNO element was reported with SDA within ‘Trading Funds and Executive agencies’. From 1 April 2023 onwards, DNO and SDA are separately identifiable and therefore DNO is presented as MOD Main and SDA within Trading Fund and Executive Agencies.

6.2 Data Revisions

Data revisions are handled in accordance with MOD’s Official Statistics Revisions and Corrections Policy.

There were no revisions to the ALS around the time this Background Quality Report was last updated.

7. Timeliness and Punctuality

This section reports on the time gap between publication and the reference period (timeliness) and the gap between planned and actual publication dates (punctuality).

7.1 Timeliness

The UK Regular Forces and MOD Civilian data extracts are obtained from databases on the third and fourth week of April, and the Intake by Parliamentary Constituency data is supplied by the single Service Analysis teams on the first week of May. The editing and production process usually takes around 2 weeks. It then takes a further 2-4 weeks to compile and quality-assure the reports and accompanying tables.

7.2 Punctuality

The following table provides an example of the timeline for 1 April 2024 Statistics.

Publication	Situation Date	Publication Date
Annual Location Statistics (ALS)	1 April 24	11 July 24

Historic and planned publication dates can be found on the Publication Release Dates section of the Gov.uk

Statistics at MOD webpage and on the UK National Statistics Publication Hub.

8. Coherence and Comparability

This section examines: the degree to which data that are derived from different sources or methods, but refer to the same topic, are similar (coherence); and the degree to which data can be compared over time and domain (comparability).

Analysis (Tri-Service) published statistics on UK Armed Forces are the definitive personnel statistics in the MOD. There are no other publicly available regular publications on the numbers of UK Armed Forces with which to ensure coherence. Within the MOD direct queries of the Joint Personnel Administration system will produce slightly different numbers due to timing and quality issues.

The UK Armed Forces personnel statistics are not always directly comparable with other countries statistics due to definitional differences of what constitutes an Armed Force. In some countries, particularly in Europe, part of the domestic police force is included in the Armed Forces. Similarly, there are not always direct equivalents to the Royal Navy / Royal Marines, Army, and Royal Air Force in other countries.

Structural changes have occurred during the time-series covered by MOD civilian personnel statistics. In some cases, this means that figures are not directly comparable across the whole period. To aid understanding of these changes and how they have impacted upon the figures the detail of these changes is provided here:

• As at 1 April 2024 within the Trading Funds and Executive Agencies, Defence Electronics and Components Agency (DECA) has been incorporated into the workforce figures for Defence Equipment & Support (DE&S). DECA was formally merged into DE&S at 1 April 2023, however the change was not implemented on departmental HR systems until 1 April 2024.
• As at 1 April 2023, Defence Nuclear Organisation (DNO) and Submarine Delivery Agency (SDA) are presented separately. Prior to 1 April 2023, DNO and SDA were not separately identifiable for the purposes of producing Official Statistics and are therefore reported together within ‘Trading Funds and Executive Agencies’. From 1 April 2023 DNO and SDA are presented separately, DNO within the Industrial and Non Industrial figures and SDA within ‘Trading Fund and Executive Agencies’.
• As at 1 April 2020, 650 posts in Head Office & Corporate Services (HO&Cs) covering security vetting in Defence Business Services UKSV were privatised.
• As at 1 April 2018 approximately 1,160 posts transferred out of DE&S Trading Entity to form Defence Nuclear Organisation (DNO) as an Executive Agency, additionally approximately 80 personnel within DG Nuclear also transferred to DNO.
• As at 1 April 2018, approximately 400 posts forming the Defence Electronics Components Agency (DECA), previously reported in Head Office & Corporate Services (HO&Cs) within MOD Main TLBs, were reported separately as an Executive Agency, for improved consistency and transparency of data reporting.
• DE&S changed status as at 1 April 2015 and was reclassified as a Bespoke Trading Entity, reported under within Trading Funds and Executive Agencies.
• There was a large reduction in Trading Fund and Executive Agency strength between 1 January 2015 and 1 April 2015. This was driven by the privatisation of Defence Support Group and the transfer of 2,000 personnel as at 1 April 2015. Approximately 450 personnel were retained with the Department as the Defence Electronic Components Agency (DECA), which was then within Head Office and Corporate Services.
• To reflect the different terms and conditions of LEC personnel, UK dependents are not included in LEC figures from October 2013. Prior to this, dependents of UK military personnel or UK-based civilian staff employed in overseas theatre (who were sometimes identified as UK dependents) had been included in LEC totals.

For the Intake into UK Regular Forces by Parliamentary Constituency (Intake) data, the Parliamentary Constituency is identified from “contact” Postcode as recorded in the RITS for Air and Navy data. Air and Navy data are produced using full “contact” Postcodes on intake and therefore provides a completely accurate intake by Constituency. Any Constituencies with no personnel recorded may have had no intake over the reported period for these two Services but this is not certain due to unknown values. For these two Services therefore, any Intake statistics produced from the RITS data source will be consistent with those published in the ALS for the same period.

However, the Army data uses the Postcode District only, not the full Postcode, as per the information held in the DRS. Postcode Districts can overlap Constituencies and therefore, we have assigned personnel to the Constituency which has a majority of Postcodes associated with the relevant Postcode District. Two Constituencies, namely Dudley South and Northampton North, have no Postcode Districts where the majority of Postcodes fall in the Constituency, and so have no reported intake. It should be noted that this does not mean that no personnel have been recruited from these Constituencies, rather they cannot be assigned there due to the methodology used.

Any Intake statistics for the Army produced using a different methodology will therefore not likely to be consistent with those published in the ALS for the same period. The methodology is currently under review and is being revised to use full Postcodes for all three services for the next Annual Location Statistics, which will increase the quality of the data produced.

Annual editions of UK Defence Statistics compendium dating back to 1992, plus historic Tri-Service publications dating back to 2002, are available in the National Archives.

9. Accessibility and Clarity

This section reports on: the ease with which users are able to access the data, the format in which the data are available, and the availability of supporting information (accessibility); and the quality and sufficiency of the metadata, illustrations and accompanying advice (clarity).

Current publications consist of detailed Excel tables containing a historic time-series of statistics and a HTML report containing commentary, graphs and tables on trends in the statistics. The Excel tables are in MS Excel Spreadsheet and Open Document Spreadsheet (ODS). The commentary in our reports identifies and analyses the key changes in the data and provides summary statistics and policy context. Graphs, tables and other data visualisation methods are used to further explain these trends.

Previous Analysis (Tri-Service) personnel location reports are published on GOV.UK and are available as PDFs or Excel value copies. Other formats may be possible for Analysis (Tri-Service) to produce on request.

All Analysis (Tri-Service) publications that use these data can be found under the “Combined military and civilian” sections under the “Personnel statistics” heading on the statistics by topic section of the MOD National and Official Statistics by topic webpage

They can also be accessed via the Statistics release calendar

Copies of the reports are also placed in the House of Commons library.

Data revisions are handled in accordance with the MOD’s Official Statistics Revisions and Corrections Policy.

10. Trade-offs between Output Quality Components

This section reports the extent to which different aspects of quality are balanced against each other.

The main trade-off is between timeliness and quality. To ensure statistics are timely the editing and validation process is restricted to around two weeks and a significant amount of automatic editing is utilised. Spending more time investigating every suspect individual personnel record could marginally improve quality at a detailed location/rank level but is unlikely to impact the aggregated statistics published in our reports.

11. Cost and Respondent Burden

This section is about the effectiveness, efficiency and economy of the statistical output.

Personnel Statistics and Analysis has six branches dedicated to producing information relating to manpower and providing analysis and advice, the majority of time is spent on adding value through analysing, forecasting and answering ad-hoc enquiries as well as producing the National Statistics.

There is very little respondent burden as the majority of the data is automatically obtained from administrative systems. However, this is supplemented with small amounts of data as well as input from other areas within the MOD.

12. Confidentiality, Transparency and Security

This section is about the procedures and policy used to ensure sound confidentiality, security and transparent practices.

12.1 Confidentiality

All published outputs are counts of individuals in particular groupings. Where there are possible disclosure issues in reporting protected characteristics, outputs are rounded according to Analysis (Tri-Service) rounding policy, which prevents disclosure of information on individuals.

Disclosure control is conducted on all statistical information provided by the MOD to safeguard the confidentiality of individuals.

12.2 Transparency

The reports provide commentary on the key features of the outputs and identify any issues or caveats to the data. This quality report provides further information on the method, production process and quality of the output.

12.3 Security

All staff involved in the statistical production process adhere to all MOD, Civil Service and data protection regulations. The data is stored, accessed and analysed using the MOD’s restricted network and IT systems, and access to raw data is password protected and approval for access is granted only by the Head of Personnel Statistics.

The Analysis (Tri-Service) website can be accessed here: Statistics at MOD

Updated: 11 October 2024