POLICE & SECURITY

British Transport Police - BTP

Central Scotland Police

City of London Police

Essex Police

Essex Police Special Constabulary

Metropolitan Police Service - MPS (1934-1941)

Metropolitan Police Service - MPS (1941-1946)

Metropolitan Police Service - MPS (1946-1949)

Metropolitan Police Service - MPS (1949-1954)

Metropolitan Police Service - MPS (1954-1973)

Metropolitan Police Service - MPS (1974-2001)

Metropolitan Police Service - MPS (2002-2004)

Metropolitan Police Service - MPS (2004 since)

Metropolitan Special Constabulary - MSC

Royal Irish Constabulary - RIC (1902-1919)

Royal Irish Constabulary - RIC (1919-1922)

Royal Ulster Constabulary - RUC (1922-1930)

Royal Ulster Constabulary - RUC (1930-1956)

Royal Ulster Constabulary - RUC (1956-1970)

Royal Ulster Constabulary - RUC (1970-2001)

Royal Ulster Constabulary - RUC (2001 since)

Surrey Police

Surrey Police - Special Constabulary