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According to the Collins Bird Guide adults have yellow-green legs, which the gull(s) in your photos appear to have. You can see the winter plumage beginning to come through around the head and neck, and that band around the bill starting to develop.
To find out about what's going on in the south west check out http://www.ispot.org.uk/forum/8409
Lat/Lng: 52.765, -0.928
OS grid ref: SK724191
Found on a fence post next to the beach road car park which overlooks the Cley Marshes nature reserve.