Metropolitan Police District Metropolitan Police District The Metropolitan Police District (MPD) is the police area which is policed by the Metropolitan Police Service in London. It currently consists of the Greater London region, excluding the City of London. The Metropolitan Police District was created by the Metropolitan Police Act 1829 as an ad hoc area of administration because the built-up area of London spread at the time into many parishes and counties without an established boundary. The district expanded as the built up area grew and stretched some distance into rural land. When county police were set up in England the forces of
History of the Metropolitan Police Service often called for assistance from the Metropolitan Police because of their detective experience. The last case of this was when the now defunct Buckinghamshire Constabulary called upon the MPS to help in the investigation of the Great Train Robbery. In 1931, Hugh Trenchard was appointed as Police Commissioner Trenchard served as head of the Metropolitan Police until 1935 and during his tenure he instigated several changes. These included limiting membership of the Police Federation, introducing limited terms of employment and the short-lived creation of separate career paths for the lower and higher ranks akin to the military system of officer