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  Series

  Government Communications Headquarters: Communications-Electronic Security Group,...

  Records relating to the security of electronic communications since 1944. The initial transfer cover such topics as: - correspondence on communications security (COMSEC) matters - agendas/minutes of meetings covering communications security policy an…

  Held by

  The National Archives, Kew

  Date

  1944-1970

  Reference

  HW 9

• Catalogue level

  Series

  Government Code and Cypher School: Signals Intelligence on Japanese Communications

  This series contains records relating to the interception and decyphering of Japanese military, naval and diplomatic communications.

  Held by

  The National Archives, Kew

  Date

  1928-1945

  Reference

  HW 67

• Catalogue level

  Series

  Government Code and Cypher School and predecessor: Meteorological Section: Correspondence

  Correspondence of the Meteorological Section with various customers of meteorological intelligence and providers of intercepted material.

  Held by

  The National Archives, Kew

  Date

  1939-1945

  Reference

  HW 54

• Catalogue level

  Series

  Government Code and Cypher School: Wireless Telegraphy Coordinator Section: Records

  This series contains records produced by the W/T Coordinator and his section at Bletchley Park, detailing activities relating to the control of radio collection of German Army and Air Force targets.

  Held by

  The National Archives, Kew

  Date

  1942-1945

  Reference

  HW 63

• Catalogue level

  Series

  Government Code and Cypher School: Reports on Second World War German Army and Air...

  This series contains weekly reports compiled by the Government Code and Cypher School of details of intercepted German army and air force wireless communications traffic during the Second World War. The reports give details of traffic volumes and cal…

  Held by

  The National Archives, Kew

  Date

  1941-1945

  Reference

  HW 45

• Catalogue level

  Series

  Government Code and Cypher School: Sigint Board and Related Committees and Sub-Committees:...

  This series consists of the minutes, papers and correspondence of the Signals Intelligence Board and its predecessor, the Cryptography and Interception Committee, and of all their respective committees and sub-committees.

  Held by

  The National Archives, Kew

  Date

  1924-1945

  Reference

  HW 42

• Catalogue level

  Series

  Government Code and Cypher School: Supreme Headquarters Allied Expeditionary Force...

  This series consists of records relating to signals intelligence work carried out by the Supreme Headquarters Allied Expeditionary Force, covering subjects such as the organisation of air signals intelligence, minutes of meetings, policy on the organ…

  Held by

  The National Archives, Kew

  Date

  1943-1945

  Reference

  HW 60

• Catalogue level

  Series

  Ministry of Defence - Defence Intelligence Staff: Directorate of Economic Intelligence:...

  This series contains assessments, reports and studies produced by the Directorate of Economic Intelligence, later the Directorate of Economic and Logistic Intelligence.

  Held by

  The National Archives, Kew

  Date

  1961-1984

  Reference

  DEFE 64

• Catalogue level

  Series

  Foreign Office and Ministry of Defence: Scientific and Technical Intelligence Branch...

  Files of the Scientific and Technical Branch and Overseas Liaison Branch of the Foreign Office and Ministry of Defence on the procedures for and results of scientific and technical intelligence gathering in Germany following its occupation by the All…

  Held by

  The National Archives, Kew

  Date

  1945-1963

  Reference

  DEFE 41

• Catalogue level

  Series

  Ministry of Defence and Cabinet Office: Central Intelligence Machinery: Joint Intelligence...

  This series contains reviews, summaries and surveys presented to the Joint Intelligence Committee. They comprise Weekly Reviews of Current Intelligence, Summaries of Current Intelligence, and Weekly Surveys of Intelligence. In 1956 the Joint Intellig…

  Held by

  The National Archives, Kew

  Date

  1956-1966

  Reference

  CAB 179

• Catalogue level

  Series

  Ministry of Defence: Defence Signals Staff: Registered Files

  Registered files of the Defence Signals Staff, relating to signals intelligence generally.

  Held by

  The National Archives, Kew

  Date

  1954-1982

  Reference

  DEFE 26

• Catalogue level

  Series

  Admiralty: Operational Intelligence Centre: Intelligence from Intercepted German,...

  File copies of teleprinter messages. The various series of messages are of two distinct types: intercepted signals, decrypted, translated, and sent from the German Naval Section of the Admiralty's Naval Intelligence Division at Bletchley Park to the …

  Held by

  The National Archives, Kew

  Date

  1941-1945

  Reference

  DEFE 3

• Catalogue level

  Series

  War Office: Military Intelligence section 9 (MI9), Escape and Evasion maps, Second...

  The material represents the UK Ministry of Defence's record set of escape and evasion maps produced by MI9 between 1940 and 1945. The set is the most comprehensive collection of MI9 maps known to exist but in itself is incomplete and copies have been…

  Held by

  The National Archives, Kew

  Date

  1940-1982

  Reference

  WO 418

• Catalogue level

  Series

  War Office and Ministry of Defence: Headquarters Middle East and successors: Records

  This series consists of files and reports produced by Headquarters Middle East and some of its successor and associated bodies which covered British Army operations after the Second World War in the Mediterranean and Middle East as well as southern, …

  Held by

  The National Archives, Kew

  Date

  1954-1974

  Reference

  WO 386

• Catalogue level

  Series

  Cabinet Office: Special Secret Information Centre: Files

  This series consists of files prepared as definitive dossiers on major defence and political issues. The file series were set up by General Ismay, Deputy Secretary on the military side of the War Cabinet and Secretary to the Chiefs of Staff Committee…

  Held by

  The National Archives, Kew

  Date

  1939-1955

  Reference

  CAB 121

• Catalogue level

  Series

  Cabinet Office: Central Intelligence Machinery: Joint Intelligence Committee (A):...

  This series comprises the Secretariat minutes of the Joint Intelligence Committee (A) during the period January 1969 to September 1974, following the redesignation of JIC as JIC (A), and thereafter the Secretariat minutes of the Joint Intelligence Co…

  Held by

  Date

  1969-

  Reference

  CAB 187

• Catalogue level

  Series

  Polish Military Intelligence: 'Historique du Réseau F2' (Historical Record of Network...

  This series consists of a history of Polish Military Intelligence network in France during the Second World War. The history outlines the establishment of the Polish Deuxième Bureau network in France in mid-1940; its development, activities, successe…

  Held by

  The National Archives, Kew

  Date

  1946

  Reference

  HD 5

• Catalogue level

  Series

  Postal and Telegraph Censorship Department, predecessors and successor: Papers

  Papers selected to illustrate the organization and work on postal and telegraph censorship during the Second World War by the Directorate of Military Intelligence at the War Office and by the Postal and Telegraph Censorship Department. The series als…

  Held by

  The National Archives, Kew

  Date

  1914-1959

  Reference

  DEFE 1

• Catalogue level

  Series

  Ministry of Economic Warfare, Special Operations Executive and successors: Headquarters:...

  This series contains the surviving records produced by Special Operations Executive headquarters sections supporting the work of the various country sections that ran active operations behind enemy lines, and also the private office papers of Lord Se…

  Held by

  The National Archives, Kew

  Date

  1935-1973

  Reference

  HS 8

• Catalogue level

  Series

  Special Operations Executive: Station 15b Exhibition: Photographs

  This series contains a photograph album prepared to record the work of SOE station 15b, as shown in a war-time display mounted in the 'Demonstration Room' in the Natural History Museum. The album contains photographs of exhibits in the display, toget…

  Held by

  The National Archives, Kew

  Date

  1940-1946

  Reference

  HS 10