Bird flu: near Loddon, South Norfolk, Norfolk (AIV 2025/12 formerly AIV SOS 2025/01)

Highly pathogenic avian influenza was confirmed in commercial poultry on 31 January 2025.

• From: Department for Environment, Food & Rural Affairs and Animal and Plant Health Agency
• Published: 29 January 2025
• Last updated: 4 March 2025 — See all updates

• Disease Type: Bird flu (avian influenza)
• Disease control zone restrictions: No longer in force
• Disease control zone type: Surveillance zone
• Virus strain: H5N1
• Case opened date: 29 January 2025
• Case closed date: 4 March 2025

Case information

4 March 2025

Following successful completion of disease control activities and surveillance in the zone around a premises near Loddon, South Norfolk, Norfolk (AIV 2025/12), the 10km protection zone has been revoked.

23 February 2025

Following successful completion of disease control activities and surveillance in the zone around a premises near Loddon, South Norfolk, Norfolk (AIV 2025/12), the 3km protection zone has ended and the area that formed it becomes a surveillance zone.

31 January 2025

Following official testing at the premises, highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry at a premises near Loddon, South Norfolk, Norfolk (AIV 2025/12 formerly AIV SOS 2025/01).

All affected poultry on the premises have been humanely culled.

A 3km protection Zone and a 10km surveillance zone have been put in place surrounding the premises.

29 January 2025

Following the report of suspicion of highly pathogenic avian influenza in commercial poultry at a premises near Loddon, South Norfolk, Norfolk (AIV SOS 2025/01), a decision has been taken to pre-emptively cull the birds based on the clinical signs, post mortem findings and rapidly increasing mortality.

All affected poultry on the premises have been humanely culled.

A 3km temporary control zone A and a 10km temporary control zone B have been put in place surrounding the premises.

Download the declaration of the ending of a surveillance zone

This revokes: Download the declaration of the ending of a protection zone (PDF)

This revokes and replaces the declaration of a protection zone and a surveillance zone (PDF)

This revokes and replaces the declaration of an avian influenza temporary control zone A and temporary control zone B (PDF)

Further information

Check:

• the updated bird flu disease control zone map
• if you need a licence to move poultry, poultry by-products, eggs, material or mammals

Case number: (AIV 2025/12)

Published 29 January 2025

Last updated 4 March 2025 + show all updates

1. 4 March 2025

   Following successful completion of disease control activities and surveillance in the zone around a premises near Loddon, South Norfolk, Norfolk (AIV 2025/12), the 10km protection zone has been revoked.

2. 23 February 2025

   Following successful completion of disease control activities and surveillance in the zone around a premises near Loddon, South Norfolk, Norfolk (AIV 2025/12) the 3km protection zone has ended and the area that formed it becomes a surveillance zone.

3. 31 January 2025

   31 January: Following official testing at the premises, highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry at a premises near Loddon, South Norfolk, Norfolk (AIV 2025/12 formerly AIV SOS 2025/01).

4. 29 January 2025

   First published.