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The Security Service, MI5, is responsible for protecting the UK against threats to national security. MI5 works with the Home Office is supported by 1 public body .
The Secret Intelligence Service, often known as MI6, collects Britain’s foreign intelligence. It provides the government with a global covert capability to promote and defend the national security and economic well-being of the country. SIS works with the Foreign, Commonwealth...
The National Security Secretariat provides coordination on security and intelligence issues of strategic importance across government. Separately, the Joint Intelligence Organisation produces independent all-source assessments on issues of national security and foreign policy importance. By supporting the work of the...
Find out about terrorist threat levels, national measures against terrorism and how to report suspect activity
Report any threats to national security - such as terrorism and espionage - to MI5 (also known as the Security Service)
Find out about safety and security requirements that apply to goods entering and exiting the UK.
The Ministry of Defence (MOD) protects the security, independence and interests of our country at home and abroad.
HM Armed Forces protects the UK from state based and terrorist threats.
United Kingdom Security Vetting (UKSV) is the single government provider of National Security Vetting (NSV). We are the centre of excellence for security vetting and enable government to protect citizens and provide vital public services, by understanding and managing personnel...
National Protective Security Authority (NPSA) is the UK’s National Technical Authority for physical and personnel protective security, working to make the UK less vulnerable and more resilient to national security threats. NPSA is part of The Security Service .
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