All the same bird, a lot of feathers around its beak, maybe from preening
No interactions present.
Lesser Black Backs also have yellow legs
Although a second year Lesser Black-back might still have pink legs...the yellow develops with age.
My Flickr photos...
It was quite close up to me, and was much bigger than any Herring Gull I had seen.
It's surprising how size can be difficult to judge, when you suddenly find yourself seeing something familiar in a different way to normal.
In fact, Herring Gulls are larger than Lesser Black-backs, so if it struck you as big, that was actually another reason why it was likely to be a Herring Gull, rather than a LBB.
Lat/Lng: 54.6345, -5.5312
OS grid ref: NW722323