20 December 2025

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in a backyard flock near Bicester, Cherwell, Oxfordshire (AIV 2025/129) on 20 December 2025.

A 3km captive bird (monitoring) controlled zone has been declared around the premises. All poultry on the premises will be humanely culled.

Highly pathogenic avian influenza (HPAI) H5N1 was confirmed at a second large commercial poultry flock near Dereham, Breckland, Norfolk (AIV 2025/130) on 20 December 2025.

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