History of the Metropolitan Police Service by the end of the 19th century. During the 1860s, the flintlock pistols that had been purchased in 1829 were decommissioned from service, being superseded by 622 Beaumont–Adams revolvers firing the .450 cartridge which were loaned from the army stores at the Tower of London following the Clerkenwell bombing. In 1883, a ballot was carried out to gather information on officers' views on whether they wished to be armed, and 4,430 out of 6,325 officers serving on outer divisions requested to be issued with revolvers. The now obsolete Adams revolver was returned to stores for emergencies, and the Bulldog 'Metropolitan
Organisation and structure of the Metropolitan Police Service formed in order to deliver a single, joined up intelligence service to the Metropolitan Police Service. The service is uniformly professionalised and the command owns all the Metropolitan Police Service intelligence professionals, including those who work in covert policing. Specialist Operations (SO) is a directorate of the Metropolitan Police Service, responsible for providing specialist policing capabilities. Until Sir Kenneth Newman's restructuring of the Metropolitan Police, SO comprised twenty units, but after the restructuring most of them were absorbed by Central Operations (now Specialist Crime and Operations). SO is currently headed by an Assistant Commissioner, with two Deputy Assistant Commissioners and