District Railway / Metropolitan District Railway
Group From 1864 To 1933
Formed to complete the 'inner circle' of the tube in London. This was effectively the southern section: Mansion House to Earl's Court and beyond. The tunnels were formed using the 'cut and cover' method so it was extremely disruptive. Known as the 'Metropolitan District Railway' until 1871. Other sections and extensions were added over the years. 1933 amalgamated with other London transport services to form the London Passenger Transport Board which would go on to become today's Transport for London.