Bird flu: near Thirsk, Thirsk and Malton, North Yorkshire (AIV2025/82)

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry near Thirsk, Thirsk and Malton, North Yorkshire on 3 November 2025.

• From: Department for Environment, Food & Rural Affairs and Animal and Plant Health Agency
• Published: 3 November 2025
• Last updated: 11 December 2025 — See all updates

• Disease Type: Bird flu (avian influenza)
• Disease control zone restrictions: In force
• Disease control zone type: Surveillance zone
• Virus strain: H5N1
• Case opened date: 3 November 2025

Case information

11 December 2025

Following successful completion of disease control activities and surveillance in the zone around a premises near Thirsk, Thirsk and Malton, North Yorkshire (AIV 2025/82). The protection zone has ended and the area that formed it becomes part of the surveillance zone.

3 November 2025

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry near Thirsk, Thirsk and Malton, North Yorkshire.

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

Download the

Declaration of the ending of a protection zone

This revokes and replaces:

Declaration of an avian influenza protection zone and surveillance zone

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 2025/82

Published 3 November 2025

Last updated 11 December 2025 + show all updates

1. 11 December 2025

   Following successful completion of disease control activities and surveillance in the zone around a premises near Thirsk, Thirsk and Malton, North Yorkshire (AIV 2025/82). The protection zone has ended and the area that formed it becomes part of the surveillance zone.

2. 3 November 2025

   First published.