Thank you for your comment. Ringing is permitted to continue to take place on sites where there have been no reported cases of Avian Flu. There is a risk assessment in place along with procedures to follow during and after the ringing process and if a sick bird was to be discovered. I hope this helps to explain why it does not stop.
When there is Avian Flu in parts of the UK, I am interested that ringing of birds does not stop. A Ringer would not want to take the chance of accidentally spreading the flu from bird to bird if one of those caught in the net had it, or is it unlikely that could happen?