Highly pathogenic avian influenza H5N1 has been found at two premises near Tattenhall, Cheshire West & Chester, Cheshire. More information is available on GOV.UK: https://www.gov.uk/bird-flu and GOV.WALES: https://gov.wales/avian-influenza-bird-flu-latest-update
Definitive requirements are set out in the published declarations for each disease control zone currently in force.
For further information see the ‘Cases and disease control zones’ section on GOV.UK: https://www.gov.uk/guidance/avian-influenza-bird-flu-cases-and-disease-control-zones-in-england#cases-and-disease-control-zones and the ‘latest AI update’ section on GOV.WALES: https://gov.wales/avian-influenza-bird-flu-latest-update
You can also check if specific areas are in a zone by using the interactive map available on GOV.UK: