Yellow-legged Gull?

Yellow-legged Gull ssp., Long Drove, Cottenham. 5th January 2007
This 3rd winter bird is extremely dark for a nominate michahellis, so one might consider Armenian Gull, Azorean atlantis or a hybrid. Azorean gull has probably lost its head-streaking by now, so that doesn't help. Given the numbers of Caspian Gulls about, one is tempted to think of something from the east. The illustration of a 3rd winter Armenian Gull in BWPi looks a very good match. (RGN)
Feedback: This bird resembles a ringed hybrid Yellow-legged x Lesser Black-backed Gull seen by Steve Cooper a few years ago.