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 the Home Office and the Mayor of London, through the Mayor's Office for Policing and Crime. The post of Commissioner was first held jointly by Sir Charles Rowan and Sir Richard Mayne. Cressida Dick is the current Commissioner having been appointed in April 2017. A number of informal names and abbreviations are applied to the Metropolitan Police Service, the most common being "the Met". In colloquial London (or Cockney slang), it is sometimes referred to as the "Old Bill". The Met is also referred to as Scotland Yard after the location of its original headquarters in a road called Great