All bird-keepers are urged to remain vigilant and take action to protect their birds from avian influenza. Scrupulous biosecurity by all bird-keepers at all times is essential to protect the health and welfare of flocks. In response to the heightened risk levels and escalating number of cases, an avian influenza prevention zone, mandating enhanced biosecurity, is in force across England, Wales and Scotland. In addition, mandatory housing for kept birds is in force across the unitary authority of the East Riding of Yorkshire, the unitary authority of York, the city of Kingston upon Hull and all districts in Lincolnshire, Norfolk and Suffolk, North Yorkshire and Shropshire, to mitigate the risk of further outbreaks of disease occurring.