3123 Class 31/1 BR Civil Engineers grey/yellow Diesel LocomotiveAn incredibly versatile locomotive that could be found almost anywhere on the UK network at some point, the Class 31s were constructed by Brush Traction between 1957 62 for BR who used them on mixed traffic duties until they were retired in 2018 FEATURES DCC ready Rotating roof fans Detailed cab interior LED directional lighting Screw link couplings SPECIFICATIONS BUILT BY Brush Traction, Loughborough NUMBER BUILT 263 NUMBER SERIES D5500 5699, D5800