37068 Grainflow & 37108 bring up the rear of the Pathfinder Tours 1Z16 05:20 Preston to Cwmgwrach 'Neath Navigator' railtour at Grovesend Colliery Loop on 2 October 1993. 37704 & 37889 are leading the train, and are just about to pass underneath the M4 motorway, which at this point is just three miles from its western end.