Hudswell Clarke

In 1862, soon after the company had been formed, they were given the initial design work on William Hamond Bartholomew's compartment boats for the Aire and Calder Navigation.

The choice of the company may have been influenced by the fact that Bartholomew, the chief engineer of the Navigation, and William Clayton, one of the founders of Hudswell and Clarke, both lived on Spencer Place in Leeds.

In the 1930s the company manufactured narrow gauge steam outline diesel-hydraulic locomotives for use at amusement parks around the country.

[4] In 1931 4-6-2 Neptune was delivered to Scarborough North Bay Railway, followed a year later by 4-6-2 Triton, both being 20 inches (510 mm) gauge.

[7] In later years, Hudswell Clarke designed and built diesel locomotives for both main-line and private company use, mainly for use on shunting operations.

The airframe (casing) for the first British nuclear bomb, Blue Danube, was manufactured by Hudswell Clarke at its Roundhay Road plant in Leeds.

It was deployed on a wide variety of aircraft of the RAF and Royal Navy, being stockpiled in the UK, Cyprus, Singapore and afloat on carriers.

All the bombs detonated at the Christmas Island H-bomb tests were contained in airframes designed and built by Hudswell Clarke.

The company were also major contributors to other military projects, including the Centurion main battle tank conversion into an armoured bridgelayer, that served with the British Army for many years.