Metropolitan Police Service

The Metropolitan Police Service (abbreviated to MPS and widely known informally as "the Met") is the territorial police force responsible for law enforcement in Greater London, excluding the "square mile" of the City of London, which is the responsibility of the City of London Police. The Met also has significant national responsibilities, such as co-ordinating and leading on counter-terrorism matters and protection of the British Royal Family and senior figures of Her Majesty's Government.

As of October 2011, the Met employed 48,661 full-time personnel. This included 31,478 sworn police officers, 13,350 non-police staff, and 3,831 non-sworn police community support officers. This number excludes the 5,479 Special Constables, who work part-time (a minimum of 16 hours a month) and who have the same powers and uniform as their regular colleagues. This makes the Metropolitan Police the largest police force in the United Kingdom by a significant margin, and one of the biggest in the world.