The Romney, Hythe & Dymchurch Railway has two mainline diesel locomotives, in addition to a number of small shunters. The 1983 TMA Engineering built Bo-Bo No.12 John Southland is pictured at New Romney on 3 June 2013, with the open cab door giving a good view of the interior. The loco is powered by a six cylinder Perkins diesel engine, developing 112hp.