Commissioner of Police of the Metropolis

The rank of Commissioner was created by the Metropolitan Police Act 1829; until 1855, the post was held jointly by two officers, but after the Metropolitan Police Act 1856 it was merged into a single post. The Commissioners were Justices of the Peace and not sworn constables until 1 April 1974.[3] The title Commissioner was not used until 1839.

The insignia of rank is a crown above a Bath Star, known as "pips", above crossed tipstaves within a wreath, very similar to the insignia worn by a full general in the British Army. This badge is all but unique within the British police, shared only with the Commissioner of the City of London Police, the smallest territorial police force, and HM Chief Inspector of Constabulary. Like all chief officer ranks in the British police, commissioners wear gorget patches on the collars of their tunics. The gorget patches are similar to those worn by generals, aside from being of silver-on-black instead of the Army's gold-on-red.

At one time, the commissioners were either retired military officers or civil servants. Sir John Nott-Bower, who served as Commissioner from 1953 to 1958, was the first career police officer to hold the post, despite several previous Commissioners having served in senior administrative positions in colonial forces, and the Metropolitan Police itself. Nott-Bower's successor Sir Joseph Simpson was the first Commissioner to have started his career at the lowest rank of Constable. However, Sir Robert Mark, appointed in 1972, was the first to have risen through all the ranks from the lowest to the highest, as all his successors have done.

As of 2008, the post of Commissioner is appointed for a period of five years.[4] Applicants are appointed to the post by the Queen, following a recommendation by the Home Secretary under the Police Act 1996.[4]

Applicants to the post of Commissioner had to be British citizens, and be "serving UK chief constables or of equivalent UK ranks and above, or have recent experience at these levels".[4] The post of Commissioner is "accountable to the Home Secretary; to the Mayor's Office for Policing and Crime, and must answer to Londoners and the public nationally."[4]

The requirement to be a British national blocked the appointment of non-British Commissioners in the past. In August 2011, Prime Minister David Cameron wanted former Los Angeles Police Department Chief Bill Bratton to become the new Met Police Commissioner, but this was blocked by the Home Office pointing out that the Commissioner has to be British.[5] This changed with an amendment to the Police Reform and Social Responsibility Act 2011 whereby a person who is or has been "a police officer in an approved overseas police force, of at least the approved rank" could be appointed, in addition to "a constable in any part of the United Kingdom".[6][7]

The selection process in 2017 to select Sir Bernard Hogan-Howe's successor involved the candidates undergoing psychometric testing in addition to interviews with the Home Secretary, Mayor of London and Policing Minister. The process is conducted in private and the Home Office has specifically called for a "news blackout."[8] The discussion and public profile of the candidates was limited to speculation and rumour, with the Home Office refusing to even confirm the shortlisted candidates covered in the media.[9]

The Centre for Public Safety has recommended the selection process be reformed, to provide opportunities for greater public, community and workforce engagement in the process. In particular, suggesting a series of community interview panels and a public candidate forum – though they maintain that the final decision should still rest with the Home Secretary.[10]

• Police ranks of the United Kingdom

• Metropolitan Police Service timeline
• Commissioner Hogan-Howe in full ceremonial dress leading crowds up the Mall during the Queen's Diamond Jubilee 2012.