Peter Kerslake says "18000 is on the 6.35 p.m. Paddington to Gloucester and Cheltenham express in about March or April 1952, the third of four duties for the locomotive that day as it would have worked the early morning 7.30 a.m.from Paddington to Bristol returning on the 12 noon to Paddington. After working this train to Swindon it will later work the 10.05 p.m. milk train to Southall for Kensington Milk Depot."