On lovely sunny days though I can't stop pointing the camera at them. They make it a little easier for you by sitting on the water. Then when you think you know which gull it is, doubts creep in and the books come out again. I'll love them one day. I think.
My head is telling me this is a Lesser black-backed Gull, but that dark bit on the bill throws in a small doubt.
I'm quite sure it is just the last features of a juvenile bird. 4th calendar year bird. (I think)
Is that a tear I can see?