| 30 January 2026 | H5N1 | near Needham Market, Mid Suffolk, Suffolk (AIV 2026/12) | Backyard Flock | | | |
| 24 January 2026 | H5N1 | near Penicuik, Scottish Borders (AIV 2026/11) | 500,000 Free Range Layers | | | |
| 19 January 2026 | H5N1 | near Bacton, Mid Suffolk, Suffolk (AIV2026/09) | Backyard Flock | | | |
| 19 January 2026 | H5N1 | second premises near Bacton, Mid Suffolk, Suffolk (AIV2026/10) | 10,500 Duck Breeders | | | |
| 15 January 2026 | LPAI H5 | near Mundford, Breckland, Norfolk (AIV 2026/07) | Game Rearing Farm | | | |
| 15 January 2026 | H5N1 | third near York, North Yorkshire (AIV2026/08) | 140,000 Broilers | | | |
| 15 January 2026 | H5N1 | near Penicuik, Scottish Borders (AIV 2026/06) | 600,000 Free Range Layers | | | |
| 13 January 2026 | H5N1 | second near York, York, North Yorkshire (AIV2026/05) | 100,000 Laying Pullets | | | |
| 11 January 2026 | H5N1 | near Penicuik, Scottish Borders (AIV 2026/04) | 205,000Pullets | | | |
| 9 January 2026 | H5N1 | near Grassington, North Yorkshire, Yorkshire (AIV 2026/03) | Backyard Flock | | | |
| 8 January 2026 | H5N1 | third premises near Newark-on-Trent, Nottinghamshire (AIV2026/02) | 13,000 Turkeys | | | |
| 5 January 2026 | H5N1 | near Blairgowrie, Perth and Kinross (AIV 2026/01) | Backyard Flock | | | |
| 31 December 2025 | H5N1 | second premises near Newark-on-Trent, Nottinghamshire AIV 2025/139 | 40,000 ducks | | | |
| 29 December 2025 | H5N1 | near Bridgwater, Somerset, Somerset AIV 2025/138 | Backyard Flock | | | |
| 27 December 2025 | H5N1 | near Alvechurch, Bromsgrove, Worcestershire AIV 2025/137 | 6,500 Ducks and Quail | | | |
| 26 December 2025 | H5N1 | near Newark-on-Trent, Newark and Sherwood, Nottinghamshire AIV 2025/136 | 7,800 Turkeys | | | |
| 24 December 2025 | H5N1 | near Penicuik, Scottish Borders AIV 2025/134 | 20,000 Organic Layers | | | |
| 24 December 2025 | H5N1 | near York, York, North Yorkshire AIV2025/135 | 26,000 broiler breeders | | | |
| 22 December 2025 | H5N1 | third premises near Dereham, Breckland, Norfolk AIV2025/132 | 27,000 Turkeys | | | |
| 22 December 2025 | H5N1 | near Penicuik, Midlothian AIV 2025/133 | 7,000 Free Range Layers | | | |