Second H5N1 AI outbreak confirmed in UK in July

• These zones restrict the movement of birds, eggs, and related materials, and require strict biosecurity protocols for all poultry keepers within the area.
• The public is also advised to avoid contact with sick or dead birds and to report any unusual bird deaths.

Ongoing risk despite decline in cases

Although the number of H5N1 cases in wild birds and poultry has declined since the peak in winter 2024–2025, the virus remains a persistent threat. Between May and July 2025, six outbreaks were reported in domestic poultry across Great Britain, all confirmed as H5N1.

The Avian Influenza Prevention Zone (AIPZ), in place since January 2025, remains active, requiring enhanced biosecurity measures nationwide. While the risk to poultry with stringent biosecurity is considered low, the risk remains higher for flocks with suboptimal protection.

Human health risk remains low

UK health authorities continue to stress that the risk to human health is very low, as there is no evidence of sustained human-to-human transmission of the H5N1 virus. However, the public is urged to remain cautious, especially those working with birds or in affected zones.

Conclusion

• The recurrence of H5N1 outbreaks in the UK highlights the importance of continued vigilance, rapid response, and strict biosecurity.
• Authorities are closely monitoring the situation and updating protocols as needed to protect both animal and public health.