After my initial thought that the above bird was a 3rd w iceland I have changed my mind after recieving an email from JJ. I did have my doubts about this bird and did consider leucistic herring gull but thought it was too small and the bill too slight. I thought the brown marks on the primaries were just dirt after feeding on the tip but after searching a few images of leucistic herring gull I now realise that these are the pale primary marks. An interesting bird and another lesson learnt.
An adult yellow legged gull also today. Very few gulls on show today and no sign of american herring gull.