Bird flu: second premises near Thirsk, Thirsk and Malton, North Yorkshire (AIV 2025/28)

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry on 12 March 2025.

• From: Department for Environment, Food & Rural Affairs and Animal and Plant Health Agency
• Published: 12 March 2025

• Disease Type: Bird flu (avian influenza)
• Disease control zone restrictions: In force
• Disease control zone type: Protection zone and Surveillance zone
• Virus strain: H5N1
• Case opened date: 12 March 2025

Case information

12 March 2025

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in commercial poultry at a second premises near Thirsk, Thirsk and Malton, North Yorkshire (AIV 2025/28).

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

Download the declaration of an avian influenza protection zone and surveillance zone

Further information

Check the updated bird flu disease control zone map.

Check if you need a licence to move poultry, poultry by-products, eggs, material or mammals.

Case number: AIV 2025/28

Published 12 March 2025