Bird flu case confirmed at Norfolk poultry farm near Loddon
Defra said further testing would be carried out at the farm near Loddon to measure if there was a larger outbreak.
"All bird keepers should remain vigilant and follow stringent biosecurity measures to prevent future outbreaks," a spokesman said.
Reuters
As well as in Norfolk and Suffolk, farmers faced mandatory housing rules in North Yorkshire, Shropshire, East Riding of Yorkshire and Lincolnshire to manage the spread.
A farm worker in the West Midlands contracted the human version of bird flu this week.
It came amid wider biosecurity rules in place across England and Scotland as part of an Avian Influenza Prevention Zone.
Poultry owners have been told they must:
The risk to humans remained low, with chicken and eggs safe to eat if properly cooked, Defra said.