The Minister for Environment, Energy and Rural Affairs declared an all-Wales Avian Influenza Prevention Zone which came into force on 11 November 2020. As of 14 December 2020, the declaration is extended and it will become mandatory to house your birds.
You must follow this guidance to help prevent your birds from becoming sick with diseases like avian influenza (bird flu) and Newcastle disease. You must read it if you keep birds for commercial, hobby or other purposes. A self-assessment checklist is also available here.