Kumlien's Gull

I had a few minutes before an appointment this afternoon and called in at Newgale to check the gulls. I quickly came upon the bird in the pics below which appears to be a 1st w Kumlien's Gull, judging by primary pattern etc. Unfortunately I didn't see it fly and couldn't hang around. I took some pictures using a phone held to a 50x scope, in poor light, so they are far from world-beating. Given the complexity of the Iceland/Kumlien's/Thayer's complex worth a good look tomorrow morning I'd say.