This gull was on the scrape at Minsmere yesterday afternoon and looked quite decent to me and a couple of other birders present for a 2y Caspian Gull. Unfortunately I only managed this rather poor iphone record shot before it flew off, but would appreciate any thoughts. I've also attached an image where I've fiddled with the highlights so you can see the head shape better. In the field the gently sloping forehead was very noticeable.