GWR Castle No.5094 Tretower Castle with a down parcels passing West Drayton on August 17, 1957. Note the number of ex LNER wooden hopper wagons in the 'Roads Reconstruction' aggregate works - were they internal user I wonder? Also good detail of the piping on a GWR outside framed Siphon G for the modellers.

Photo: K.L. Cook/Rail Archive Stephenson