R30439 RailRoad Class 31 TFL Construction '31271' Stratford Diesel LocomotiveThis Hornby RailRoad Class 31 model is presented in the Transport for London construction livery, bringing a modern splash of colour to your 00 gauge layout. Based on the reliable Brush Type 2 locomotives, this model features wide tension lock couplings and moulded plastic. DCC ready, it comes fitted with a 21 pin decoder socket, allowing for easy digital upgrade. History Originally introduced in the late 1950s, the Class 31s became a familiar sight