A flock of pheasants in Wyre, Lancashire, have avian influenza. Defra confirmed the presence of H5N8 in the commercial breeding farm on 24 January.
Some birds at the premises have died and the remaining birds will be humanely culled. Defra put in place a 3km Protection Zone and a 10km Surveillance Zone around the infected premises to limit the risk of the disease spreading.
It is the third UK case of bird flu in commercial flocks of poultry since December, when a turkey farm in Lincolnshire was infected. Another turkey farm, close to the original outbreak in the county, was also struck in January.
In addition, several cases in wild birds have been confirmed around the UK.
The government has banned poultry keepers from allowing birds outside, and all poultry must be housed to try and prevent the virus spreading further.