I have posted pics of 3 different birds here in the last couple of months, each of which I thought was a YLG, but none have been confirmed as such. The bird in the attached pics (taken today, Gloucestershire) looked to have yellowish legs but definitely a mid-grey mantle, darker than BHG, lighter than LBB, about the same as Common Gull. Size-wise, it looked as big as a Herring. The only thing I can't seem to get the hang of is YLG structure (head shape, neck proportions, etc.), so anyone like to comment? (If this aint a YLG, I think I will have to give up looking for them!)