This loco is one of three at Steeple Grange that come from the Derbyshire manufacturer Clayton Equipment. It is a Compact 1¾ tonne, 7hp (5.2kW) locomotive, designed to work through tunnels only 3' 6" in diameter. It has an electronic controller, and a single traction motor driving both axles through spiral reduction gearing. It belonged to Hunslet Holdings at one point in its life, and came to Steeple Grange from private ownership. It is now operational having received a new electronic control unit.