The Siege of Sidney Street results in armed Metropolitan Police officers taking to the streets with the military to deal with armed anarchist criminals. The miners strike in South Wales results in many Metropolitan Police officers assisting to maintain law and order. Assassination attempt on the life of the Commissioner, Sir Edward Henry. Establishment of the Metropolitan Police Special Constabulary on a permanent basis. The Commissioner calls for legislation to be introduced to restrict the trade in pistols following the assassination attempt on his own life.
Annual leave is suspended for the first year of the war.
Women Police founded in this year. However, police in this year convey over 11,000 people to hospital. The Commissioner Sir Edward Henry signs a Police Order in November stating that any member of the Metropolitan Police renders himself liable to dismissal by joining a union. At this point in WW1, some 2,300 members of the Metropolitan Police were serving in the armed services. 1918 Major strike of Metropolitan Police in search of better pay and conditions, and union recognition.