- 1Wiring diagrams for diesel electric locomotives (GEC/2/2/2/58)
1949-1961, file - 2Wiring diagrams for diesel electric shunting locomotives (GEC/2/2/2/66)
1957-1958, file - 3Conduit layouts and equipment arrangements (GEC/2/2/2/89)
1950-1952, file - 4Control circuit and schematic diagrams (GEC/2/2/2/100)
1934-1968, file - 5Wiring diagrams for British Railways and South African Railways (GEC/2/2/2/119)
1954-1956, file - 6Southern Railway electrical equipment layouts and welded assemblies (GEC/2/2/2/134)
1957-1960, file - 7Conduit layouts (GEC/2/2/2/145)
1958-1962, file - 8British Rail Southern Region Brighton Renewal equipment layouts (GEC/2/2/2/149)
1963-1969, file - 9Overseas railways electrical schematics (GEC/2/2/2/178)
1933-1971, file - 10Mechanical details (GEC/2/2/2/202)
1956-1964, file - 11Automatic air door gear details (GEC/2/2/21/1)
1969-1970, file - 12Electric trailers and coaches wiring diagrams (GEC/2/2/2/233)
1946-1974, file - 13Frames, brackets, clips and spring shoe arrangements (GEC/2/2/2/278)
1945-1948, file - 14Pipes, plates, smokebox, and pony truck mechanical details (GEC/2/2/2/279)
1944-1946, file - 15Mechanical parts (GEC/2/2/2/286)
1942-1949, file