The lines that formed the London Underground, as well as trams and buses, became part of an integrated transport system in 1933 when the London Passenger Transport Board or London Transport was created.
Linije koje su formirale londoski metro, kao i tramvaji i autobusi, postali su dijelom integriranog transportnog sustava 1933., kada je osnovan London Passenger Transport Board (LPTB) ili London Transport.