Modified Hall class 4-6-0 No 7924 Thornycroft Hall and 47XX 2-8-0 pass Dawlish Warren with a down express on August 13, 1956.
Peter Kerslake says "The use of a Class 47xx on express passenger trains became frequent in the 1950s, mostly on Summer Saturdays when Castles and Kings were in short supply at Old Oak Common."

Photo: R.O. Tuck/Rail Archive Stephenson