The down Cornish Riviera double-headed by Collett Castle class 4-6-0 no. 5064 Bishop's Castle and King no. 6022 King Edward III between Cornwood and Hemerdon on 23/5/57. According to my allocation tables, 5064 was a 82A Bristol Bath Road engine at the time whilst 6022 was allocated to 81A Old Oak Common.
[Mike Morant collection]