The Airfix OO gauge Class 31 Diesel Locomotive 31401 in BR Blue livery is a vintage replica of the British Rail Class 31/4 locomotive from 1977. This model features a Co-Co wheel configuration and is powered by DC, with analogue control. Made from plastic and diecast materials, this classic locomotive is a must-have for collectors and hobbyists. With its detailed design, running capability, and nostalgic appeal, this British Railways-themed locomotive is a perfect addition to any model railway collection. spares only!