<P> From 22 November 2012, police authorities outside London were replaced by directly - elected Police and Crime Commissioners . In London the City of London Police continued to be overseen by City of London Corporation, whilst the Mayor of London has responsibility for the governance of the Metropolitan Police . </P> <P> In Northern Ireland, the Police Service of Northern Ireland is supervised by the Northern Ireland Policing Board . </P> <P> In Scotland, Police Scotland is overseen by the Scottish Police Services Authority . </P> <P> The British Transport Police and the Civil Nuclear Constabulary had their own police authority established in 2004 . These forces operate across the United Kingdom and their responsibility is to the specific activities they were established to police . </P>

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