The Grange class locomotives were designed by Charles Collett and built at Swindon between 1936 and 1939 as replacements for 43xx class Moguls. For comparison with one of these locos, no. 4302, follow this link.. In fact many Granges were built using a pool of reconditioned parts from withdrawn 43xx locomotives. They are effectively a smaller wheeled version of the Collett Hall class. For a description and images of one of these locos, Aldenham Hall, follow this link.