Records of the City and South London Railway (formerly the City of London and Southwark Subway Company), comprising Board meetings minutes and General meetings minutes; volume of monthly reports giving Operating Statistics of the City and South London and Central London Railway Companies and volume of monthly reports relating to the generating stations at Stockwell (City and South London Railway) and Shepherds Bush (City London Railway).

Records of the Charing Cross, Euston and Hampstead Railway, comprising Board meeting minutes and General meetings minutes.

Records of the Central London Railway comprising Board Meetings minutes; General Meetings minutes and Assented Stockholders Meetings minutes; correspondence; reports; contracts; handbills; maps and other administrative papers.

This collection includes: committee minutes, financial reports and records; bound and published research reports, consultation reports, and opinion reports produced both by CAPITAL as well as affiliated associations and organisations; leaflets, pamphlets, and flyers produced by CAPITAL and affiliated organisations; correspondence between CAPITAL, members of parliament, affIliated organisations and members of the public; and one video cassette.

Records of 73 bus companies which became part of London Transport. The records vary from company to company but generally include minutes of Board and Shareholder meetings and financial records such as ledgers, journals and cash books.

Records of the Broad Street/Richmond Line Joint Committee, including minutes of meeting of the Joint Committee; minutes of meetings with Members of Parliament including the Minister of Transport; correspondence; press releases and publicity material; financial records; Hansard reports on the Parliamentary debate on railways; and press cuttings.

Records of the Baker Street and Waterloo Railway, including minutes of Board Meetings, Committee Minutes and Shareholders Meetings; indexes to minutes.

Records of the Aylesbury and Buckingham Railway Company, comprising Directors' Meetings minutes; Proprietors' meetings minutes; Wotton Tramway Committee minutes; and Contract Plan and Sections for the Aylesbury - Verney Railway.