No.17 is undergoing overhaul by Shed 47 Group, Lathalmond, Fife. It is an example of the largest (16" diameter cylinder) standard Barclay product. It was delivered new to the National Coal Board to work on colliery railways around Twechar in Dunbartonshire, and worked at Gartshore, Cardowan and Bedlay collieries. After Bedlay closed in 1981, No.17 moved to Barony Colliery in Ayrshire, where in 1982 it became the National Coal Board's last working steam locomotive in Britain.
Further details of the working life of this locomotive are available here.