A quick look at Rufforth airfield this afternoon revealed this monster 1w/2cy Glaucous Gull. Sadly I didn't manage to get anything else before the flock was flushed by dog walkers. Presumably this bird is a male, he dwarfed the nearby Herring and Lesser Black-backed Gulls and was close in size to many of the Great Black-backs present. Lots of adult Lesser Black-backs present (c100) a sign of spring despite the snow and freezing easterly wind. Another birder had had a 1w Iceland just before the flock flew.