 The layout of at least the most northerly of the raised sidings lent itself to unloading slates conventionally, side-by-side from narrow gauge wagons to standard gauge, but use in this way is not described in sources.The GWR, like the LNWR and the FR, provided the quarry owners with free use of narrow gauge wagons in an attempt to promote the use of their own route.A batch of 50 were ordered from Swindon in 1899, a survivor was on public display at Llechwedd Slate Caverns in 1977.