Russell is a narrow-gauge side-tank 2-6-2T Hunslet, and was built in 1906. Originally made for the Portmadoc, Beddgelert and South Snowdon Railway Company, Russell had an eventful career, including several years with North Wales Narrow Gauge Railways Company, which became part of the until that company, together with the Welsh Highland Railway in 1922.
After being requisitioned by the Ministry of Supply during the Second World War, Russell was demobbed and sent to work in Dorset, followed by spells working at Talyllyn railway, Kinnerley, Carnforth, Llanberis and Gelerts Farm Works.
A cracked rod has forced the locomotive out of action. A replacement rod will need to be forged, which will be expensive for the Railway.