Narrow gauge railways have long been a source of fascination for many. From famous public lines such as the Ffestiniog Railway and Lynton & Barnstaple Railway, to peat extraction lines in Cumbria and brickworks systems on Humberside, the narrow gauge railway has transcended two centuries. A big part of the charm of these lines is the locomotives that were built to operate them. Narrow gauge is defined as anything less than the standard gauge of UK...