- 1 April
- 1871 – Brill Tramway opens between Quainton Road and Wooton.
- 1871 – Great Northern Railway opens branch from Alexandra Palace to Enfield.
- 1872 – Edgware, Highgate and London Railway extends from Finchley Central to High Barnet.
- 1966 – British Airports Authority begins operations and takes control of Heathrow, Gatwick and Stansted Airports.
- 1986 – Terminal 4 opens at Heathrow Airport.
- 1994 – Railtrack forms on the privatisation of British Rail.
- 1994 – Waterloo & City line becomes part of London Underground.