No formation details found.
Swansea Class 108 DMU set 946, 52046 and presumably 53939, at Machynlleth on 28 May 1988 on what was possibly an E.C.S. Robert Thomas.
A Class 108 labelled set 946 - presumably Swansea set 53939 + 52046 - at Shrewsbury on July 4, 1988. Nigel Menzies.
Do you have any images of the set you can add?