Records of the Underground Electric Railways Company of London Limited, including minutes of Board meetings; minutes of General meetings; minuts of General Managers Conferences; minutes of the Finance Committee, Works Committee, Advisory Committee and General Purposes Committee; minutes of meetings of Stockholders; minutes of meetings of Executive Officers; registers of designs, trademarks and licences; registers of monthly expenditure; monthly traffic reports and statistics; financial reports; departmental reports; technical handbooks and staff manuals; papers relating to foreign visits by staff; diaries; and publications.

Records of the Union Construction Company, manufacturer of tube and tram cars, comprising minutes of Board meetings and minutes of General meetings.

Records of the Union Surplus Lands Company, comprising minutes of Board meetings and minutes of General meetings.

Records of the London County Council Valuation Department, 1891-1965, including papers on the assessment of railways in London; press cuttings and other papers relating to transport organisation including fares and facilities, River Thames passenger services, canals, policy, railways, parking, congestion, air fares, the British Transport Commission, the London Transport Executive, pay and working conditions, bus services, arterial roads, the London Traffic Act, 1924; papers relating to town planning schemes; legislation affecting London and papers relating to road improvement schemes.

Registers of applications for mortgages and housing loans under the Small Dwellings Acquisition Acts and the Housing Acts. Returns of gross and rateable value of properties by locality; pamphlets, articles and posters relating to street and road improvements; site plans of LCC hospital properties transferred to the Ministry of Health in July 1948 under the National Health Service Act, 1946.

Records of the Watford and Edgware Railway, comprising minutes of Board meetings and minutes of General meetings.

Records of the Watford Joint Railway Committee; including minutes of Committee meetings; general ledger; journal; cash book and financial accounts.

Records of the Wembley Park Estate Company, property developers, comprising minutes of General meetings and minutes of Board meetings.

Records of the Whitechapel and Bow Railway, comprising Board meeting minutes; General meeting minutes; minutes of the London, Tilbury and Southend and Metropolitan District Railways Whitechapel and Bow Railway Joint Committee; and minutes of the Midland and Metropolitan District Railways Whitechapel and Bow Joint Committee.