Mute Swan 460Y
Mute Swan 461Y
Mute Swan 462Y
A little research on the internet showed that the birds had been ringed by Sorby Breck Ringing Group, and details from David, our data manager, showed that they had been ringed at Walton Dam on 5th September 2016.
Looking at the one of the pictures of 462Y it's interesting to see that its leg is pale, compared to the other two birds whose feet were black.
This means that 462Y is a "polish" Mute Swan. See here for details about another "polish" bird seen at Clumber Park in 2016. I'll pop back over the summer to check on the these birds, and update on any developments.