History of the Metropolitan Police Service been headed by a Commissioner, rather than a Chief Constable which is the highest rank in police forces outside London. The first Commissioners to hold the post were Lieutenant-Colonel Sir Charles Rowan and Sir Richard Mayne. When Sir Charles Rowan died, leaving Sir Richard Mayne as the surviving Commissioner, Captain William Hay was drafted in to jointly run the force with Mayne. However, because the two Commissioners did not agree on methods of running the force, since 1855 it was decided that only one Commissioner would run the force. Metropolitan Police patrols took to the streets on 29 September 1829,
Metropolitan Police Service a London borough) is a separate police area and is the responsibility of the separate City of London Police. The Ministry of Defence Police are responsible for policing of Ministry of Defence property throughout the United Kingdom, including its headquarters in Whitehall and other MoD establishments across the MPD. The British Transport Police are responsible for policing of the rail network in the United Kingdom, including London. Within London, they are also responsible for the policing of the London Underground, Tramlink, The Emirates Air Line (cable car) and the Docklands Light Railway. The English part of the Royal Parks Constabulary,