Inside the NCB shed at Mountain Ash on 19 October 1973 is 0-6-0ST Llantarnam Abbey (note the missing 'R' on the right hand tank-side) built by Andrew Barclay as No. 2074/1939. I have no record of the loco behind it but bringing up the rear appears to be the perhaps more interesting Avonside-built Sir John (No. 1680/1914).
Location: Mountain Ash Colliery
Original line: National Coal Board
Photographer: Bill Jamieson
Contact photographer: Bill Jamieson
Date: 19/10/1973
Image number: 50867