No. 4472 and 6103 The Cathedral Express, Flying Scotsman is a LNER Class A3 4-6-2 "Pacific" steam locomotive built in 1923 for the London and North Eastern Railway (LNER) at Doncaster Works to a design of Nigel Gresley. It was employed on long-distance express passenger trains on the East Coast Main Line by LNER and its successors, British