Chernobyl
Judging by the size of seagulls in Aberdeen, I can only assume they are descendents of those in Sellafield.
@Iawndart: having been to chernobyl, I can confirm there is no need to worry about mutated gulls, or any other form of bird life there! The cooling ponds though are home to some rather large fish. I didnt notice any with three eyes, however.