This gull was marked as 2nd CY Herring Gull at the Pitsea Landfill Site, Essex, UK ( 51°32'15"N, 0°31'26") on March 21, 2015. See http://www.ntgg.org.uk/cgi-bin/map.cgi?p=recmap&t=r&r=GV15865 for more details.
Two months later this bird was seen near the most northern part of Norway!