36 years ago, almost to the week, i saw what was identified at the time as an arctic warbler at Holme, Norfolk and recently I found some pics of the bird ((now i/d'd as the Holme wing-barred Phylloscopus warbler(probably either greenish or two-barred greenish warbler) - still looks like an arctic to me)).The larger pic is an arctic warbler at Burnham Overy Staithe , Norfolk - worth waiting 36 years for!