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• Foreign Office: Prisoners of War and Aliens Department: General Correspondence from...

  Held by

  The National Archives, Kew

  Date

  1915-1919

  Reference

  FO 383

• Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister,...

  Held by

  The National Archives, Kew

  Date

  1844-1945

  Reference

  HW 1

• Records of the Cabinet Office

  Held by

  The National Archives, Kew

  Date

  1863-2024

  Reference

  CAB

• Loraine Papers

  Held by

  The National Archives, Kew

  Date

  1836-1973

  Reference

  FO 1011

• War Office: Geographical Section General Staff: War of 1914-1918: Gallipoli Campaign,...

  Held by

  The National Archives, Kew

  Date

  1905-1929

  Reference

  WO 301

• Government Code and Cypher School and Government Communications Headquarters: Records...

  Held by

  The National Archives, Kew

  Date

  1914-1954

  Reference

  HW 50

• Government Code and Cypher School: Records Concerning Polish Business and Activities

  Held by

  The National Archives, Kew

  Date

  1940-1946

  Reference

  HW 47

• Government Code and Cypher School: Security of Allied Cyphers Section: Security Files...

  Held by

  The National Archives, Kew

  Date

  1917-1979

  Reference

  HW 40

• Foreign Office and Successors: Control Commission for Germany (British Element),...

  Held by

  The National Archives, Kew

  Date

  1913-1946

  Reference

  FO 1078

• Government Code and Cypher School: Administration Files on the Radio Security Service

  Held by

  The National Archives, Kew

  Date

  1938-1946

  Reference

  HW 34

• Government Code and Cypher School: Diplomatic Section: Reports of German Diplomatic...

  Held by

  The National Archives, Kew

  Date

  1942-1943

  Reference

  HW 36

• Government Code and Cypher School, Foreign Office and General Post Office: Maintenance...

  Held by

  The National Archives, Kew

  Date

  1941-1945

  Reference

  HW 55

• Records created or inherited by Government Communications Headquarters (GCHQ)

  Held by

  The National Archives, Kew

  Date

  1914-2024

  Reference

  HW

• Government Code and Cypher School: Diplomatic Section: Diplomatic Decrypts Passed...

  Held by

  The National Archives, Kew

  Date

  1935-1945

  Reference

  HW 37

• Special Operations Executive: Registry: Miscellaneous Nominal Card Index

  Held by

  Date

  1940-1946

  Reference

  HS 20

• Government Code and Cypher School and Government Communications Headquarters: London...

  Held by

  The National Archives, Kew

  Date

  1944-1954

  Reference

  HW 71

• Government Code and Cypher School: Liaison with Signals Intelligence Organisations...

  Held by

  The National Archives, Kew

  Date

  1941-1946

  Reference

  HW 57

• Government Code and Cypher School: Air Section: Correspondence, Analytical and Technical...

  Held by

  The National Archives, Kew

  Date

  1940-1942

  Reference

  HW 66

• Ministry of Defence - Defence Intelligence Staff: Directorates of Service Intelligence...

  Held by

  The National Archives, Kew

  Date

  1957 - 1998

  Reference

  DEFE 61

• Ministry of Defence: Major Committees: Registered Files

  Held by

  The National Archives, Kew

  Date

  1900-1990

  Reference

  DEFE 27