Bird flu: sixth premises near Thirsk, Thirsk & Malton, Yorkshire (AIV 2025/42)

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry in a sixth premises near Thirsk, Thirsk & Malton, Yorkshire on 5 April 2025.

• From: Department for Environment, Food & Rural Affairs and Animal and Plant Health Agency
• Published: 5 April 2025
• Last updated: 14 May 2025 — See all updates

• Disease Type: Bird flu (avian influenza)
• Disease control zone restrictions: No longer in force
• Disease control zone type: None
• Virus strain: H5N1
• Case opened date: 5 April 2025
• Case closed date: 14 May 2025

Case information

14 May 2025

Following the successful completion of disease control activities and surveillance within the zone surrounding the sixth premises near Thirsk, Thirsk & Malton, Yorkshire (AIV 2025/42), the 10km surveillance zone has been revoked.

9 May 2025

Following the successful completion of disease control activities and surveillance within the zones surrounding the sixth premises near Thirsk, Thirsk & Malton, Yorkshire (AIV 2025/42), the 3km protection zone has ended and the area that formed it becomes part of the 10km surveillance zone surrounding this premises.

5 April 2025

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry in a sixth premises near Thirsk, Thirsk & Malton, Yorkshire (AIV 2025/42).

A 3km protection zone and 10km surveillance zone has been declared around the premises. All poultry on the premises will be humanely culled.

Declarations

Download the declaration of the revocation of a surveillance zone (PDF)

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

This revokes and replaces: the declaration of an avian influenza protection zone and surveillance zone (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 2025/42

Published 5 April 2025

Last updated 14 May 2025 + show all updates

1. 14 May 2025

   Following the successful completion of disease control activities and surveillance within the zone surrounding the sixth premises near Thirsk, Thirsk and Malton, Yorkshire (AIV 2025/42), the 10km surveillance zone has been revoked.

2. 9 May 2025

   Following the successful completion of disease control activities and surveillance within the zones surrounding the sixth premises near Thirsk, Thirsk & Malton, Yorkshire (AIV 2025/42), the 3km protection zone has ended and the area that formed it becomes part of the 10km surveillance zone surrounding this premises.

3. 5 April 2025

   First published.