A 3km Protection Zone and a 10km Surveillance Zone have been put in place around the infected premises to limit the risk of the disease spreading. The remaining live birds in the small flock of chickens and ducks are being humanely culled.

Chief Veterinary Officer Nigel Gibbens said: "We have taken swift action to limit the risk of the disease spreading. Restrictions are now in place around the affected premises and a full investigation is underway to determine the source of the infection."

"This finding in a backyard flock shows how essential it is for all poultry owners, even those who just keep a few birds as pets, to do everything they can to keep them separate from wild birds and minimise the risk of them catching avian flu via the environment.

"This means keeping birds in a suitable building where possible, and taking precautions such as putting up netting, keeping food and water inside and disinfecting footwear and equipment after contact with birds."