- 1Archive of Robert Stephenson & Co Ltd (ROB)
1823 – c 1960, fonds - 2GEC Traction Archive (GEC)
1846-1996, fonds - 3Archive of the Heritage Railway Association (HRA)
1938 - 2002, fonds - 4Records of the Association of Minor Railway Companies (HRA/1)
1938 - 1988, sub-fonds - 5Minute Book (HRA/1/1)
21 October 1938 - 1 March 1978, item - 6Records of the Railway Preservation Association (HRA/2)
c1961, sub-fonds - 7Railway Preservation Association Prospectus (HRA/2/1)
c1961, item - 8Records of the Association of Railway Preservation Societies (HRA/3)
1965 - 1996, sub-fonds - 9Prospectuses of the Association of Railway Preservation Societies (HRA/3/2)
1965 - 1992, item - 10Memorandum of Association (HRA/3/1)
c1965 - c1996, item - 11ARPS Minutes (HRA/3/5)
1961 - 1996, series - 12ARPS AGM Minutes (HRA/3/3)
31 January 1981 - 20 January 1996, series - 13ARPS Annual Reports and Annual Reports of the Council with Accounts (HRA/3/4)
1980 - 1992, series - 14ARPS/AIR Statistical Surveys (HRA/3/6)
June 1986 and 1995, item - 15Records of the Association of Independent Railways and Preservation Societies (HRA/4)
1995 - 1998, sub-fonds