- 1General arrangements and outlines of diesel electric locomotives for UK & overseas railways (GEC/2/2/2/116)
1959-1973, file - 2Mechanical details (GEC/2/2/18/1)
1964-1982, file - 3Mechanical details (GEC/2/2/2/201)
1964-1967, file - 4General arrangements, general outlines and seating plans (GEC/2/2/2/205)
1936-1963, file - 5Gear arrangements, saddle tank steam locomotives, 2800 bhp diesel electric locomotive general outline, and general arrangements (GEC/2/2/7/9)
1929-1950, file - 6Sudan Government Railways mechanical parts (GEC/2/2/2/392)
c 1960, file - 7Sudan Railways, Nyasaland Railways, Empresa Municipal de Transportes (Madrid), Husky Stock Administration, Wilfred Marley Ltd and Post Office Railways order files (GEC/3/4/1)
1957-1967, file - 8English Electric Company photo albums (GEC/4/3/9)
c 1960-c 1969, file - 9English Electric Company test specifications (GEC/3/11/5)
1955-1964, file - 10English Electric Company test specifications (GEC/3/11/8)
1961-1962, file - 11English Electric Company test specifications (GEC/3/11/9)
1960-1962, file - 12English Electric Company test specifications (GEC/3/11/11)
1950-1970, file - 13English Electric Company test specifications (GEC/3/11/13)
1947-1962, file - 14English Electric Company test specifications (GEC/3/11/15)
1948-1969, file - 15Metropolitan-Vickers Electrical Co Ltd & English Electric Company test specifications (GEC/3/11/17)
1949-c 1968, file