I popped down to check for these at midday, ran into Rob Jones (@glambirder) and by about 1245h they flew in from the east with some Canada Geese. They were wary but eventually swam out and waddled onto the north shore and walked up the field. They look to be albifrons race. The south side of the hedge overlooking north shore was a good hide to pop a few record shots off. Still present at 1400h.