- 1Drawing Office records (GEC/2)
1874-1994, sub-fonds - 2Engineering records (GEC/3)
1846-1993, sub-fonds - 3Drawings (GEC/2/2)
1874-1993, series - 4Manuals (GEC/3/6)
1913-1984, series - 5Publications (GEC/4/1)
1904-1996, series - 6Spare parts catalogues (GEC/4/7)
1898-1975, series - 7AEI Traction Division drawings (GEC/2/2/3)
1959-1989, sub-series - 8Control equipment schemes and details (GEC/2/2/3/1)
1966-1967, file - 9Cable schedule and wiring diagrams for Class AL1 & AL5 (GEC/2/2/3/2)
1966-1967, file - 10Electrical equipment drawings (GEC/2/2/3/3)
1965, file - 11Control apparatus equipment drawings (GEC/2/2/3/4)
1971-1973, file - 12Wiring diagrams and mechanical details (GEC/2/2/3/5)
1962-1979, file - 13Equipment layout and wiring diagrams (GEC/2/2/3/6)
1960-1986, file - 14Master controller and wiring diagrams (GEC/2/2/3/7)
1961-1989, file - 15Electrical equipment drawings (GEC/2/2/3/8)
1963-1964, file