Double heading the CRE used because the Kings had been withdrawn because of bogie failure. A very interesting shot , and Laira's' Brecon Castle' was certainly used frequently at this time to deputise for the' Kings" , taken out of service with cracked bogie frames. It's certainly the down' Cornish Riviera' , heading west to Plymouth and the picture shows how the Running Foremen at Old Oak and at Laira were obliged to roster whatever they had available on to such Top Link workings during this period of time , with the' Kings' out of action.