The Mayor of London is an elected politician who, along with the London Assembly of 25 members, is accountable for the strategic government of Greater London.
The London Assembly is an elected body, part of the Greater London Authority, that scrutinises the activities of the Mayor of London and has the power, with a two-thirds majority, to amend the Mayor's annual budget and to reject the Mayor's draft statutory strategies.
London, or Greater London, is a region of England which forms the administrative boundaries of London.
London Mayor Hits Trump On Muslim Ban by The Young Turks
The current mayor is Sadiq Khan, who took up office on 9 May 2016.
Sadiq Aman Khan PC is a British politician and the current Mayor of London since 2016.
The position had been held by Ken Livingstone from the creation of the role on 4 May 2000, until he was defeated in May 2008 by Boris Johnson, who served two terms before being succeeded by Khan.
Kenneth Robert "Ken" Livingstone is an English politician who served as the Leader of the Greater London Council from 1981 until the council was abolished in 1986, and as Mayor of London from the creation of the office in 2000 until 2008.
Alexander Boris de Pfeffel Johnson PC MP, known as Boris Johnson, is a British politician, popular historian and journalist.
The role, created in 2000 after the London devolution referendum in 1998, was the first directly elected mayor in the United Kingdom.
The Mayor of London is the mayor of the entirety of Greater London, including the City of London, for which there is also the ceremonial Lord Mayor of the City of London.
Each London Borough also has a ceremonial mayor or, in Hackney, Lewisham, Newham or Tower Hamlets, an elected mayor.