Ken Livingstone took office as the first mayor of London.

Kenneth Robert Livingstone is an English former politician who served as the Leader of the Greater London Council (GLC) from 1981 until the council was abolished in 1986, and as Mayor of London from the creation of the office in 2000 until 2008. He also served as the Member of Parliament (MP) for Brent East from 1987 to 2001. He is a former member of the Labour Party, ideologically identifying as a socialist.

The mayor of London is the chief executive of the Greater London Authority. The role was created in 2000 after the Greater London devolution referendum in 1998, and was the first directly elected mayor in the United Kingdom.