Housing measures to protect poultry and captive birds from avian influenza in England are now in force. It is a mandatory requirement for all bird keepers across England to keep their birds housed and to follow strict biosecurity measures in order to limit the spread and to eradicate the disease.
More information is available on GOV.UK at: https://www.gov.uk/government/news/avian-influenza-housing-order-to-be-introduced-across-england.
Definitive requirements are set out in the published declarations for each disease control zone currently in force. More information is available on GOV.UK: https://www.gov.uk/guidance/avian-influenza-bird-flu-cases-and-disease-control-zones-in-england
You can also check if specific areas are in a zone by using the following interactive map: https://defra.maps.arcgis.com/apps/webappviewer/index.html?id=8cb1883eda5547c6b91b5d5e6aeba90d.