Transport for London owner of Tramlink
London Underground, responsible for running London's underground rail network, commonly known as the tube, and managing the provision of maintenance services by the private sector. This network is sub-divided into different service delivery units:
London Underground
Deep Tube: Bakerloo, Central, Victoria, Waterloo & City, Jubilee, Northern and Piccadilly lines.
SSL (Sub Surface Lines): Metropolitan, District, Circle and Hammersmith & City lines.
Elizabeth line, a high-frequency hybrid urban–suburban rail service on dedicated infrastructure in central London (built as part of the Crossrail Project); and on National Rail lines to the east and west of the city. Operation is undertaken by MTR Elizabeth line, a private-sector concessionaire, and maintenance by Network Rail.
Surface Transport, consisting of:
Docklands Light Railway (DLR): an automatically driven light metro network in East and South London, although actual operation and maintenance is undertaken by a private-sector concessionaire (a joint venture of Keolis and Amey).
London Buses, responsible for managing the red bus network throughout London and branded services including East London Transit, largely by contracting services to various private sector bus operators. Incorporating CentreComm, London Buses Command & Control Centre, a 24-hour Emergency Control Centre based in Southwark.
London Dial-a-Ride, which provides community transport services throughout London.
London Overground, which consists of certain suburban National Rail services within London. Operation is undertaken by Arriva Rail London, a private-sector concessionaire, and maintenance by Network Rail.
London River Services, responsible for licensing and co-ordinating passenger services on the River Thames within London.
London Streets, responsible for the management of London's strategic road network.
London Trams, responsible for managing London's tram network, by contracting to private sector operators. At present the only tram system is Tramlink in South London, contracted to FirstGroup, but others are proposed.
London congestion charge, a fee charged on most cars and motor vehicles being driven within the Congestion Charge Zone in Central London.
Public Carriage Office, responsible for licensing the famous black cab taxis and private hire vehicles.
Victoria Coach Station, which owns and operates London's principal terminal for long-distance bus and coach services.
"Delivery Planning" which promotes cycling in London, including the construction of Cycle Superhighways.
"Special Projects Team"  manages the contract with Serco for the Santander Cycles bike rental scheme.
Walking, which promotes better pedestrian access and better access for walking in London.
London Road Safety Unit, which promotes safer roads through advertising and road safety measure.
Community Safety, Enforcement and Policing, responsible for tackling fare evasion on buses, delivering policing services that tackle crime and disorder on public transport in co-operation with the Metropolitan Police Service's Transport Operational Command Unit (TOCU) and the British Transport Police.
Traffic Enforcement, responsible for enforcing traffic and parking regulations on the red routes.
Freight Unit, which has developed the "London Freight Plan" and is involved with setting up and supporting a number of Freight Quality Partnerships covering key areas of London.