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  General records of the Government Code and Cypher School

  LIAISON WITH ALLIED ORGANISATIONS: Polish business and activities files HW 47; US based intelligence organisations HW 57; Intelligence related allied cypher messages

  Held by

  Date

  1914-1979

  Reference

• Catalogue level

  Series

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

  This series contains records on GC&CS liaison with signals intelligence organisations in the United States from 1943 to 1945, with correspondence between the organisations, reports and details of exchanges of crypt and technical information. The …

  Held by

  The National Archives, Kew

  Date

  1941-1946

  Reference

  HW 57

• Catalogue level

  Piece

  Kesselring's order of the day outlining tasks to help fulfil Fuehrer's Great Plan....

  Kesselring's order of the day outlining tasks to help fulfil Fuehrer's Great Plan. 2nd Army requests air attacks on ridge north of Chernigov and on artillery concentrations. Summary of operations from 8th Air Corps to 1st Airfleet for Sept 6: Leningr…

  Held by

  The National Archives, Kew

  Date

  1941 Sept 9

  Reference

  HW 1/57

• Catalogue level

  Piece

  Development of liaison between US Army Signal Intelligence Service and the British...

  Development of liaison between US Army Signal Intelligence Service and the British Y services

  Held by

  The National Archives, Kew

  Date

  1942 Aug 21 - 1945 Aug 13

  Reference

  HW 57/27

• Catalogue level

  Piece

  Co-operation between GC&CS, Signals Liaison Unit (SLU), Washington and the Signal...

  Co-operation between GC&CS, Signals Liaison Unit (SLU), Washington and the Signal Security Agency (SSA), Washington on Axis communications and ciphers: main papers

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01 - 1943 Dec 31

  Reference

  HW 57/36

• Catalogue level

  Piece

  Communications liaison

  Communications liaison

  Held by

  The National Archives, Kew

  Date

  1941 Mar 01 - 1941 Nov 26

  Reference

  HW 57/9

• Catalogue level

  Piece

  Co-operation including division of effort between signals intelligence between Britain...

  Co-operation including division of effort between signals intelligence between Britain and America

  Held by

  The National Archives, Kew

  Date

  1943 Feb 10 - 1943 May 17

  Reference

  HW 57/23

• Catalogue level

  Piece

  British-Canadian-American radio intelligence discussions in Washington DC

  British-Canadian-American radio intelligence discussions in Washington DC

  Held by

  The National Archives, Kew

  Date

  1942 Apr 06 - 1942 Apr 17

  Reference

  HW 57/15

• Catalogue level

  Piece

  An American report on the British Y Service

  An American report on the British Y Service

  Held by

  The National Archives, Kew

  Date

  1942 Jan 01 - 1942 Dec 31

  Reference

  HW 57/16

• Catalogue level

  Piece

  Technical co-operation with USA

  Technical co-operation with USA

  Held by

  The National Archives, Kew

  Date

  1942 Sep 05 - 1945 Mar 30

  Reference

  HW 57/21

• Catalogue level

  Piece

  Inter-service Y mission led by Captain Humphrey Sandwith to Washington

  Inter-service Y mission led by Captain Humphrey Sandwith to Washington

  Held by

  The National Archives, Kew

  Date

  1942 Feb 07 - 1942 Jul 05

  Reference

  HW 57/8

• Catalogue level

  Piece

  Co-operation with the US Army Sigint Organisation based at Arlington Hall, Washington

  Co-operation with the US Army Sigint Organisation based at Arlington Hall, Washington

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1944 Apr 30

  Reference

  HW 57/30

• Catalogue level

  Piece

  Liaison on meteorological cyphers

  Liaison on meteorological cyphers

  Held by

  The National Archives, Kew

  Date

  1942 Feb 01 - 1942 Oct 31

  Reference

  HW 57/22

• Catalogue level

  Piece

  Exchange of information on Enigma

  Exchange of information on Enigma

  Held by

  The National Archives, Kew

  Date

  1941 Oct 01 - 1942 Dec 28

  Reference

  HW 57/10

• Catalogue level

  Piece

  Co-operation with USA

  Co-operation with USA

  Held by

  The National Archives, Kew

  Date

  1942 May 02 - 1946 Feb 01

  Reference

  HW 57/26

• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Nov 01-1940 Nov 10

  Reference

  HW 29/57

• Catalogue level

  Piece

  Intelligence - Handling and Use of GAF [German Air Force] Low-grade. Notes on the...

  Intelligence - Handling and Use of GAF [German Air Force] Low-grade. Notes on the development of Sigint support for air operations, specifically for Bomber Command. These trace the development of 'BMP' reporting on German air defences and fighter rea…

  Held by

  The National Archives, Kew

  Date

  1940 Aug 01 - 1945 Jun 03

  Reference

  HW 50/57

• Catalogue level

  Piece

  Monthly letters from Colonel O'Connor (GC&CS representative in Washington) to the...

  Monthly letters from Colonel O'Connor (GC&CS representative in Washington) to the Director, GC&CS, attaching monthly notes and reports from other GC&CS liaison officers

  Held by

  The National Archives, Kew

  Date

  1943 Dec 26 - 1944 Dec 31

  Reference

  HW 57/2

• Catalogue level

  Piece

  Co-operation with the US Army Sigint Organisation based at Arlington Hall, Washington

  Co-operation with the US Army Sigint Organisation based at Arlington Hall, Washington

  Held by

  The National Archives, Kew

  Date

  1944 May 01 - 1944 Aug 31

  Reference

  HW 57/31

• Catalogue level

  Piece

  Establishment of an US Y station in the United Kingdom

  Establishment of an US Y station in the United Kingdom

  Held by

  The National Archives, Kew

  Date

  1942 Aug 24 - 1942 Aug 29

  Reference

  HW 57/28