37421 runs alongside the Afon Dyfi (River Dovey) at Glandyfi with the 1Z36 12:10 Aberystwyth to Birmingham New Street special on 5 August 2002. This was an additional service run in connection with the Jewish conference at Aberystwyth. Interestingly, this mid Wales jaunt was while it was en-route from over a years use in the Scottish Highlands and before a spell of use on the Cardiff to Rhymney line. It would return north of the border after only a few month's use in Wales.