The virus was confirmed at Redgrave Park farm

A 3km protection zone set up to stop the disease spreading from Redgrave Park farm, on the Norfolk-Suffolk border, has been lifted.

Another protection zone, around a second farm nearby, will be removed on 10 December if no new cases emerge.

Wider surveillance and restriction zones imposed following the outbreak are to go on 19 December.

Other restrictions on bird gatherings and movements of poultry and poultry meat will remain in place.

The measures were put in place to protect birds from the H5N1 strain of avian flu following an outbreak at Redgrave Park farm on 13 November.

The second protection zone was set up around the nearby Hill Meadow farm, which shares its workforce with Redgrave Park, and to which the disease had spread.

The Department Environment, Food and Rural Affairs has been unable to confirm the source of the outbreak but has not ruled out wild birds as the cause.

Millions of birds worldwide have either died from the H5N1 strain or been killed to prevent the spread of the disease.