History of the Metropolitan Police Service established a second and more effective committee, and acted upon its findings. Robert Peel, believing that the way to standardise the police was to make it an official paid profession, to organise it in a civilian fashion, and to make it answerable to the public. After he presented his ideas to Parliament, they were approved and made official with the Metropolitan Police Act of 1829. During the early 19th century, the Industrial Revolution witnessed London becoming larger geographically and more significant economically. It became clear that the locally maintained system of volunteer constables and "watchmen" was ineffective, both in detecting
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