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The Mayor’s Office for Policing And Crime (MOPAC) is the strategic oversight body which sets the direction and budget for the Metropolitan Police Service on behalf of the Mayor. It ensures the Metropolitan Police Service is run efficiently and effectively and holds it, and other criminal justice services, to account on behalf of Londoners.

The Police Reform and Social Responsibility Act 2011 established a Police and Crime Commissioner for each police force area across England and Wales. In London, the equivalent to Police and Crime Commissioner is the elected Mayor of London, Boris Johnson.

The Mayor is able to appoint a Deputy Mayor for Policing and Crime to undertake the vast majority of duties assigned to him and he has done so. Stephen Greenhalgh has been the Deputy Mayor for Policing & Crime since 1st June 2012.

As well as setting the direction and budget for the MPS, MOPAC sets targets, scrutinises police performance and commissions selects services on behalf of the Mayor - including crime prevention schemes in boroughs via the London Crime Prevention Fund and, from 1st October 2014, victim support services across London.

All operational decision-making on day-to-day policing matters remains the responsibility of the Metropolitan Police Commissioner, Sir Bernard Hogan-Howe.