Cosmeston a.m. A Little Egret was resting by the W lake ‘island’ – it was very distant so the pix are rubbish. But pale bill and dull legs seem to point to 1st yr bird. Very vocal large GCG juv was pestering it’s parent. Also a very vocal Green Woodpecker was in the conservation area but I couldn’t see it. There were about 20 Sand Martins over W lake – the first hirundines I’ve seen in the park for about a week. The LBBG was an evil looking brute!
Glamorgan Bird Club 
That a GBBG, not LBBG, isn’t it John? Pink legs etc. And as you say, a brute. For newcomers, GBBG = Great black-backed gull, LBBG = Lesser black-backed gull.
Hmm looks like you might be right. GBBGs are so infrequent at Cossie I just passed it off as one of the usual LBBGs – which can be pretty big!. Webs do look pinkish although I sometimes find that LBBs legs are not overly yellow.