Mediterranean gulls have maintained a pretty much constant presence on Warren View football pitch, at the back of our house, for the past two or three weeks. At least 3 adult-types (inc a presumed 3rd summer), 5 first summers and a juvenile have been hopping between the pitch and estuary but the above bird is a bit odd. It is a first summer with an adult-type head which, according to Malling Olsen/Larsson, accounts for less than 5% of the population. I must have seen hundreds of first summers over the years but I can't personally recall seeing one like this. Note this bird is also ringed.