Issued under the National Registration Act of 1939 The only time Britain had an identity card system was between 1939 and 1952. Compulsory registration of all citizens and issuance of identity cards was part of the terms of the National Registration Act of 5 September 1939. The Act set up a National Register, containing details of all citizens: 1. Names (Surname, Christian Name, Initials) 2. Sex 3. Age 4. Occupation, profession, trade or employment, 5. Residence (Postal address, City/Town, County) 6. Marriage status 7. Armed Forces Reserve/Auxiliary Forces/Civil Defence status The data was used by the government to track the huge numbers of persons who were dislocated due to mass evacuation/essential employment relocation and to provide information essential to implementation of rationing/war effort planning. The compilation of the Register data was entrusted to government registrars in conjunction with local authorities who were responsible for the accuracy and completeness of the information. Each registrant was issued an identity card which contained the holder's registration number, full name(s) and current address. Changes of address had to be recorded by the local registrar. All identity card entries had to be verified and certified (stamped) by a registrar. Members of the Armed Forces, Home Guard, Merchant Marine, Police and Firemen were exempt. Identity Cards had to be carried on the person at all times to provide proof of residency and had to be produced on demand by any uniformed Police Officer or member of the Armed Forces/Home Guard on duty. National Registration/Identity Card carrying may seem odious in this present age of Civil Liberties emphasis, but those were desperate times with the very existence of the nation in jeopardy. I cannot recall anyone objecting to the provisions of the National Registration Act during the War years.