Looks a bit like a Caspian Gull- not sure on the covert pattern.
Winter is here: back to looking through gulls. I noticed very few Lesser black-backed gulls today- less than 1% of the large gulls present. There were more Great black-backed gulls (about 15).
Juvenile/1st winter Med Gull. One of two birds present today. There were still some traces of juvenile plumage on the lower scaps and odd mantle feather on both birds.