I saw a very large Gull heading North over Memorial Gardens sometime between 8.15-8.45, prob a GBBG - too big to be a LBBG. The bird looked a juvenile too.
Managed to get a (very poor) picture of it from the bench (it was up the other end). It looked like a fine adult through bins. I tried to walk slowly round but by the time I got up there it had gone!