 As of July 2019, there are over 21,000 licensed vehicles on London's roads.Regulation of the trade passed to the Metropolitan Police in 1850 and was undertaken by the Public Carriage Office, which was originally in an annex to New Scotland Yard in Whitehall called "the Bungalow".It moved to 109 Lambeth Road in 1919, remaining there until 1966, when it moved to 15 Penton Street, Islington.