locomotives, Princess Elizabeth and Princess Margaret Rose for Billy Butlin to use at the Empire Exhibition in Glasgow in 1938 which were then transferred to his holiday camp in Clacton when the exhibition closed. In later years, Hudswell Clarke designed and built diesel locomotives for both main-line and private company use, mainly for use on shunting operations. Surviving locomotives Steam locomotives Diesel locomotives Standard gauge () British Rail Class D2/7 (none preserved) British Rail Class D2/12 (one preserved) D577/1932 Mary at Middleton Railway Southam (works no. D604) was outside the Great Western Country Pub and Restaurant, Bishop's Itchington, near Southam, Warwickshire in 2006 but has since left for an unknown destination Southam 2 (works no. D625) at Leeds Industrial Museum Mighty Atom (works no. D628) at Ribble Steam Railway Sparky (works no. D629) at Ribble Steam Railway Margaret (works no. D1031) at Ribble Steam Railway Cadbury No. 14 (works no. D1012) was at Cadbury World. Arrived at the Statfold Barn Railway in 2022, where it is to be cosmetically restored as a "gate guardian". Manchester Ship Canal 4001 Alnwick Castle (works no. D1075 of 1958) at Winfield's Store, Haslingden, Lancs Manchester Ship Canal 4002 Arundel Castle (works no. D1076 of 1958) at East Lancs Railway D631/1946 Carroll at Middleton Railway D707 No. 21 at the Rutland Railway Elland No.1 (works no. D1153) at Mangapps Railway Museum, Burnham-on-Crouch gauge Eight 145HP, 20 ton locomotives, and twenty-four 225HP, 29 ton locomotives, for the Sierra Leone Government Railway, supplied between 1954 and 1961. (not necessarily preserved) gauge No. D558 (built 1930) at the Moseley Railway Trust at their Apedale Valley Light Railway No. D564 (built 1930) at the Phyllis Rampton Trust Steam-outline diesel locomotives gauge Neptune (1931), Scarborough North Bay Railway Triton (1932), Scarborough North Bay Railway Robin Hood (1932), Scarborough North Bay Railway Poseidon (1933), Scarborough North Bay Railway gauge Mary Louise (1933), Pleasure Beach Express, Blackpool Carol Jean (1933), Pleasure Beach Express, Blackpool Geoffrey Thompson OBE (1934), Pleasure Beach Express, Blackpool Princess Elizabeth (1938), Midland Railway - Butterley undergoing restoration. Princess Margaret Rose (1938), Midland Railway - Butterley Military engineering During the Second World War the company was one of many engineering firms that diversified into armaments. After the War, Hudswell Clarke was closely involved in various secret programmes, including the British nuclear weapon programme. The airframe (casing) for the first British nuclear bomb, Blue Danube, was manufactured by Hudswell Clarke