'The Honourable Artillery Company' steam engine, c 1935.

'The Honourable Artillery Company' steam engine, Clas 4-6-0 'The Royal Scot' engine No. 6144, seen here on the West Coast Main Line near Carpenders Park between Harrow and Watford. This train was allocated to Liverpool (Edge Hill), and is probably a Euston to Liverpool Lime Street expres, maybe the Mersyside Expres.