In 1975 Standard wagon built 115 hopper wagons for British Steel to transport of limestone to the smelters on Teeside. Unusually, no TOPS plates or ownership prefix appears to be applied. S-kits have a 4mm kit. A scale drawing is in Monk-Steel, David (2011) Merry-go-round on the rails. HMRS publishing, Butterley Station, Derbys. 196 pages ISBN 978-0-902835-30-6.