Transport for London (TfL) is the local government body responsible for most aspects of the transport system in Greater London in England. Its role is to implement the transport strategy and to manage transport services across London. Its head office is in the Windsor House in the City of Westminster.

TfL was created in 2000 as part of the Greater London Authority by the Greater London Authority Act 1999. It gained most of its functions from its predecessor London Regional Transport in 2000. The first Commissioner of TfL was Bob Kiley. The first Chair was London Mayor Ken Livingstone, and the first Vice-Chair was Dave Wetzel. Ken Livingstone and Dave Wetzel were to remain in office until the election of Boris Johnson as Mayor in 2008.

It did not take over responsibility for the London Underground until 2003, after the controversial Public-private partnership (PPP) contract for maintenance had been agreed. Management of the Public Carriage Office had previously been a function of the Metropolitan Police.

London ⁱ/ˈlʌndən/ is the capital city of England and the United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium. London's ancient core, the City of London, largely retains its square-mile mediaeval boundaries. Since at least the 19th century, the name London has also referred to the metropolis developed around this core. The bulk of this conurbation forms the London region and the Greater London administrative area, governed by the elected Mayor of London and the London Assembly.

London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transport all contributing to its prominence. It is the world's leading financial centre alongside New York City and has the fifth-largest city GDP in the world (and the largest in Europe). London has been described as a world cultural capital. It was the world's most visited city during 2011 and London Heathrow is the world's busiest airport by number of international passengers. London's 43 universities form the largest concentration of higher education in Europe. In 2012 London will become the first city to host the modern Summer Olympic Games three times.