London and North Eastern Railway (LNER) W1 10000 locomotive. The experimental Gresley W1 No. 10000 "Hush-Hush" was the only 4-6-4 tender locomotive to run in Britain.
London and North Eastern Railway (LNER) W1 10000 locomotive. The experimental Gresley W1 No. 10000 "Hush-Hush" was the only 4-6-4 tender locomotive to run in Britain.