British Rail Class 14

The BR Class 14, nicknamed the Teddy Bears on account of their rounded cab profile, was a class of fifty-six 0-6-0 diesel-hydraulic shunting and trip-working locomotives built by British Railways at Swindon Works in 1964–65, designed for the short-trip freight and yard shunting duties on the former GWR Western Region where diesel-hydraulic transmission had been the standard since the Western Region's decision to pursue the Voith hydraulic system rather than the diesel-electric used by the rest of BR.

The Class 14 used a Paxman Ventura 6YJXL diesel engine producing 650 hp with Voith hydraulic transmission, giving a compact and powerful shunting locomotive well suited to the colliery and industrial trip workings of South Wales and the Midlands. The locomotive's short wheelbase allowed operation on curves inaccessible to longer types, and the hydraulic transmission gave smooth power delivery for shunting operations.

The Class 14's working life on BR was remarkably short. The rapid closure of the collieries and industrial sidings it was designed to serve — a direct consequence of the Beeching closures and the decline of the South Wales coal industry — left the fleet without work within a few years of delivery. Many were sold to the National Coal Board and the British Steel Corporation, where they continued working at collieries and steelworks for decades. Others went to industrial buyers in Europe. An unusually large number — around twenty — eventually entered preservation, making the Class 14 one of the best-represented diesel classes in the heritage fleet relative to its original numbers.