W. G. Bagnall was a locomotive manufacturer from Stafford, England which was founded in 1875 and operated until it was taken over in 1962 by English Electric.

[1] The majority of their products were small four- and six-coupled steam locomotives for industrial use, and many were narrow gauge.

[5] They also used marine (circular) fireboxes on narrow gauge engines, a design that was cheap but needed a different firing technique.

During World War II, Bagnall was subcontracted work for the Hunslet Austerity 0-6-0ST which resulted in 52 being manufactured from 1943 to 1947.

16539 (In the LMS 1934 renumbering scheme it became No.7456) was built by Bagnall in 1926 was one of two locomotives regauged by the London, Midland and Scottish Railway for the Northern Counties Committee, the other locomotive was built by Hunslet Engine Company of Leeds which lasted until 1963, the Bagnall lasted until 1956 when a suspect crank pin led to her early withdrawal.

The Victor/Vulcan 2994-6 locomotives were ordered by the Steel Company of Wales (SCOW) for their Abbey, Margam and Port Talbot works in 1950.

They had a whole range of advanced features, such as 18" X 26" cylinders, together with piston valves, roller-type big-end and side-rod bearings, manganese steel axle-box and horn plate liners, hopper ashpans, self-cleaning smokeboxes, rocking grates and Lambets wet sanding.

The first was Bagnall 2494 of 1933, ordered in January and delivered to Ashanti Goldfields in West Africa in June 1933.

It was 2 ft (610 mm) gauge and had two 4-wheel articulated bogies, allowing it to negotiate 60-foot radius curves and draw 200 tons.

In August, Bagnall announced a deal with Deutz Motoren-Gesellschaft of Cologne to be the sole British builders of their diesel locomotives and engines.

[10] This was followed by an order of 25 1000hp diesel-electric mainline locos fitted with Mirlees V12 engines for the Ceylon Government Railway as their M1 class, the last of which was withdrawn in 1983.

Two Bagnall steam locomotives were converted to overhead electric for the Greaves Llechwyd Slate Mine.

A Bagnall inspired design is popular in the world of live steam locomotives, known as the Sweet Pea.