Got some feedback from the two med gulls seen at the end of Southend Pier on tuesday, both birds being ringed in Belgium with the adult ringed in June 2005 ringed as an adult, thus making this bird 10yrs+ old, and the second winter bird back for its second winter at the pier!
Found this Caspian Gull (new bird) at the stone barges of Rainham yesterday tho possible hybrid not ruled out, comments welcome.