The Hornby R2803XS Class 31 (31233) BR Sub Sector Locomotive in OO Gauge is a pre-built model designed for enthusiasts of British Rail transportation. This DC-powered locomotive features a Co-Co wheel configuration, a scale of 1:76, and a plastic construction. With analogue control system and DCC sound, this ready-to-go locomotive captures the essence of the British Rail era. The detailed design and high-quality craftsmanship make it a standout piece for railway collectors and hobbyists alike.