GWR 56XX 0-6-2T No 6626 on a local at Lwynpia on 12 May 1956. The duty target is C over B. This CB was a passenger working off Cardiff Cathays shed. But we don't know which one (CA worked Cardiff Queen St to Rhymney Valley), hopefully someone can tell us the route!

Photo: R.O. Tuck / Rail Archive Stephenson