In case you are a local person who keeps poultry and is not clear about the rules regarding having them outside while the avian flu alert is on, the situation is that
If you keep poultry – whether on a commercial scale or simply a small backyard flock – you are now required by law to house them (keep them under cover) or otherwise keep them separate from wild birds. This requirement (the Prevention Zone) has now been extended until 28 February 2017. We have also banned gatherings of poultry across the UK
This is the link to take you to the full information: https://www.gov.uk/government/news/avian-influenza-bird-flu-in-winter-2016-to-2017 The website also includes aguide for keepers of backyard flocks on how to reduce the risk to your birds from Avian Flu.
And for walkers:
Members of the public are encouraged to report dead wild waterfowl (swans, geese or ducks), or other dead wild birds such as gulls or birds of prey, to the Defra helpline on 03459 33 55 77. Defra will then collect some of these birds and test them to help us understand how the disease is distributed geographically and in different types of bird.