Transport for London

Umbrella organisation (reporting to London's Mayor?) for:

• Croydon Tramlink
• Docklands Light Railway
• London Transport, which includes
  • London Underground
  • [London Buses]?
• Taxi? licensing

and various other transport-related maintenance activities. Most transport systems which come under the control of Transport for London accept Travelcards? in addition to their own ticketing schemes.

[Official website]