The Baguley valve gear is a type of steam engine valve gear invented by Ernest E. Baguley, the Chief Draughtsman of the W.G. Bagnall company of locomotive manufacturers.
The first locomotives were 35 W. G. Bagnall 4-4-0T locomotives, constructed in 1898; followed by 18 Krauss 2-4-0T and 16 Krauss 0-6-2T in 1900 and 30 Nasmyth, Wilson and Company and North British Locomotive Company 0-6-4T in 1907.
Six new Garratts were supplied in 1942, and twenty 4-8-0s were built by W. G. Bagnall and Andrew Barclay Sons & Co..