Which Gull?

I’m a bit perplexed with this one. Bill colour looks to be a 1st year bird but doesn’t seem heavy enough, and plumage looks too clean for one of the larger gulls. Bill colour and shape also looks wrong (to me) for juvenile BHG or Common Gull. No collar or wing bar as I would have expected to see in juvenile Kittiwake but overall shape and ‘feel’ says Kittiwake to me??? Any opinions appreciated.