Developing an unhealthy interest in these of late. It'll have to change. Fortunately this morning's efforts, in the capable company of Kev du Rose, John Wright and Mike Weedon, were very productive so I may give other birds a go for a while.
The Caspian Gull is a first winter with a deformed bill first seen by Josh Jones. The Iceland Gull is missing P9 from its right wing and may be yet another different individual, possibly the fourth in the area this year. None seem to stay long and do not seem to appear at the CEGB roost. The Glaucous looks to be the same one I photographed back on 28 Jan.
Iceland Gull Larus glaucoides, first-winter
Glaucous Gull Larus hyperboreus, first-winter
Caspian Gull Larus cachinnans, first-winter
Digiscoped with Canon Powershot A640 and Leica APO77 x32