Class 31 - 31418 BR Blue O Gauge eventually swapping its 'corporate image'

eventually swapping its 'corporate image' for civil engineer's 'Dutch' in October 1991

Finished in Railfreight grey and quickly named Mirrlees Pioneer

When demobbed

Iarnrod Eireann / IE Two-axle Ballast Hopper multi-pack F

in CIE Green Livery

Class 31 - 31418 BR Blue O Gauge eventually swapping its 'corporate image'31418 BR Blue Between 1971 and 1975, 24 Class 31s were upgraded with electric train heating capability (ETH) courtesy of a 320kW Brush BL100 30 alternator, the same as fitted to the similarly modified Class 45 1 Peaks and Class 47 4s. Powered directly from the engine, this provided an impressive ETH index rating of 66, perfect for their expected duties shuttling empty coaching stock (ECS) in and out of Kings Cross, Paddington and St. Pancras as well