Catalogue description Government Code and Cypher School: Security of Allied Cyphers Section: Security Files on Allied World War II Communications

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Details of HW 40
Reference: HW 40
Title: Government Code and Cypher School: Security of Allied Cyphers Section: Security Files on Allied World War II Communications
Description:

This series contains files produced by the Security of Allied Cyphers Section, dealing with various aspects of work to prevent and counter enemy penetration of allied cyphers during the Second World War. A number of the files, though opened during the war, include later material.

The series includes records of GC&CS's correspondence with the Oxford University Press about wartime production of printed forms and other material required by the School, and with Mansfield College, Oxford about the wartime occupation of the college for cypher work.

Date: 1917-1979
Held by: The National Archives, Kew
Former reference in its original department: 22A and 22B
Legal status: Public Record(s)
Language: English
Creator:

Foreign Office, Government Code and Cypher School, 1922-1946

Physical description: 274 file(s)
Access conditions: Open unless otherwise stated
Immediate source of acquisition:

Government Communications Headquarters , 2001-2005

Custodial history: Government Code and Cypher School until 1946, then Government Communications Headquarters
Accumulation dates: Series ran 1943-1945
Selection and destruction information: These records contain information significant in the conduct of the Second World War and have been selected for permanent preservation in accordance with the PRO acquisition policy (para 2.2.1.3).
Accruals: No future accruals expected

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