The international relations of the Greater London Authority are carried out by the Mayor of London as part of the mayor's responsibility to promote Greater London's global links on behalf of the British capital. In addition to work done as part of the 2012 London Olympics, the Greater London Authority (GLA) estimates that 700,000 jobs in London depend on foreign companies and the tourist industry.
During his mayoralty, Ken Livingstone signed city partnerships during his terms with; Beijing, Delhi, Moscow, New York City, Paris and Tokyo.
During his mayoralty, Boris Johnson signed partnership agreements with New York City, Paris and Tokyo.
Under Ken Livingston, the GLA maintained overseas offices: in Brussels (in conjunction with London Councils), Beijing/Shanghai and Delhi/Mumbai, as well as consultancies operating from Caracas and Moscow. As part of his reduction of the GLA's budget, Boris Johnson pledged to review overseas offices and only the Beijing and Brussels offices remained operational.