Castle class 4-6-0 No 4073 Caerphilly Castle approaches Iver with a Paddington to Ilfracombe (?) express on June 21, 1930.
Peter Kerslake says "Well turned out by the cleaners at its home shed of Old Oak Common the pioneer "Castle" speeds down through Iver at the head of a West country express from the Capital.
Allocated from new in August 1923 to Old Oak "Caerphilly Castle" spent much of its working life as a London engine until July 1950 when it was reallocated to Bristol before in February of 1957 being sent to Cardiff Canton from where it was withdrawn in May 1960 after running almost two million miles, the fourth highest recorded mileage for any of the "true" members of the class.
In this view 4073 is coupled to its original 3500 gallon tender, the class receiving the larger 4000 gallon versions from 1932."
Photo: George R. Grigs/Rail Archive Stephenson