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,
Police aviation in the United Kingdom force to operate an aeroplane. Police aviation in England and Wales was once a force-by-force, or forces working in partnership, organisation, however from April 2012 it gradually became centralised as the National Police Air Service. The final force to join, the Metropolitan Police, joined in 2015. In 1921, an R33 Airship was able to help the police in traffic control around the Epsom and Ascot horse-racing events. The large mural depicting the 1936 Battle of Cable Street public order incident on the side of St. George's Town Hall in the East End of London depicts the police autogyro overhead that