37412 & 37671 Tre Pol and Pen speed through South Brent with the 6S55 09:45 Burngullow to Irvine china clay slurry tanks on 26 September 1993. At this date the train still deserved the name 'silver bullets' as the stainless steel wagons had yet to acquire the grime of later years. The Cornish allocated 37s worked the train all the way to Scotland, and at 550 miles this is the longest freight flow in the country. The signal box is all that remains of South Brent station.