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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

  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

  1943 Jan 01 - 1943 Dec 31

  Reference

  HW 57/29

• Catalogue level

  Piece

  MEW [Ministry of Economic Warfare] Liaison. Berkeley Street correspondence with MEW

  MEW [Ministry of Economic Warfare] Liaison. Berkeley Street correspondence with MEW

  Held by

  The National Archives, Kew

  Date

  1943 Sep 23 - 1944 Sep 01

  Reference

  HW 53/57

• Catalogue level

  Piece

  British-Canadian-USA signals intelligence liaison including meeting held in April...

  British-Canadian-USA signals intelligence liaison including meeting held in April 1942

  Held by

  The National Archives, Kew

  Date

  1942 Apr 01 - 1942 Oct 31

  Reference

  HW 57/12

• 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

  1945 Jan 01 - 1945 Jul 31

  Reference

  HW 57/5

• Catalogue level

  Piece

  United States signals intelligence boards and committee

  United States signals intelligence boards and committee

  Held by

  The National Archives, Kew

  Date

  1942 Sep 11 - 1943 Mar 31

  Reference

  HW 57/17

• Catalogue level

  Piece

  Exchange of European cryptographic information between Bletchley Park and the Signal...

  Exchange of European cryptographic information between Bletchley Park and the Signal Security Agency (SSA), Washington

  Held by

  The National Archives, Kew

  Date

  1943 Jan 25 - 1945 Aug 30

  Reference

  HW 57/1

• Catalogue level

  Piece

  Paper presented by Captain Sandwith RN on British radio intelligence at a joint US-British-Canadian...

  Paper presented by Captain Sandwith RN on British radio intelligence at a joint US-British-Canadian meeting

  Held by

  The National Archives, Kew

  Date

  1942 Apr 06

  Reference

  HW 57/14

• Catalogue level

  Piece

  Water supplies at Bletchley Park

  Water supplies at Bletchley Park

  Held by

  The National Archives, Kew

  Date

  1942 Feb 03 - 1944 Nov 20

  Reference

  HW 64/57

• Catalogue level

  Piece

  British Y Committee co-operation with its American counterpart

  British Y Committee co-operation with its American counterpart

  Held by

  The National Archives, Kew

  Date

  1942 Jul 01 - 1942 Aug 31

  Reference

  HW 57/20

• Catalogue level

  Piece

  Signals passed between signals intelligence authorities in USA, UK and the US mission...

  Signals passed between signals intelligence authorities in USA, UK and the US mission in Moscow concerning the provision of Ultra material to the USSR

  Held by

  The National Archives, Kew

  Date

  1944 Apr 27 - 1945 Aug 15

  Reference

  HW 57/33

• Catalogue level

  Piece

  Technical report on visit of inter-service Y mission to USA and Canada

  Technical report on visit of inter-service Y mission to USA and Canada

  Held by

  The National Archives, Kew

  Date

  1942 Mar 01 - 1942 Jun 30

  Reference

  HW 57/13

• Catalogue level

  Piece

  Albanian Directorate of Security messages including activity on Albanian/Greek and...

  Albanian Directorate of Security messages including activity on Albanian/Greek and Albanian/Yugoslav borders

  Held by

  The National Archives, Kew

  Date

  1949 Feb 23 - 1949 Apr 20

  Reference

  HW 75/57

• Catalogue level

  Piece

  Reports in the series QT/9751 to QT/9999.

  Reports in the series QT/9751 to QT/9999.

  Held by

  The National Archives

  Date

  1942 Dec 28-1942 Dec 31

  Reference

  HW 20/57

• Catalogue level

  Piece

  General Intelligence (Japanese): The Current Party by Lieut. Cdr. S.G. Putt, R.N.V.R....

  General Intelligence (Japanese): The Current Party by Lieut. Cdr. S.G. Putt, R.N.V.R.A description of the party responsible for current intelligence and support to the 'T' reporting watch, part of N.S. IIIJ, later IVJ.

  Held by

  The National Archives, Kew

  Date

  1942 Aug 01-1945 Sep 24

  Reference

  HW 8/57

• Catalogue level

  Piece

  Secret Writing messages. (Described at item level)

  Secret Writing messages. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1941 Nov 17-1943 Sept 29

  Reference

  HW 15/57

• Catalogue level

  Piece

  Investigation into success or otherwise of Japanese efforts against allied cyphers...

  Investigation into success or otherwise of Japanese efforts against allied cyphers and communications

  Held by

  The National Archives, Kew

  Date

  1945 Nov 06 - 1945 Nov 30

  Reference

  HW 57/18

• Catalogue level

  Piece

  Appointment of RAF officer as MOD's representative at Arlington Hall, Washington

  Appointment of RAF officer as MOD's representative at Arlington Hall, Washington

  Held by

  The National Archives, Kew

  Date

  1943 Nov 15 - 1943 Nov 30

  Reference

  HW 57/19

• Catalogue level

  Piece

  Reports on visits by Major Haigh, Colonel Tiltman and Colonel Maltby to North America

  Reports on visits by Major Haigh, Colonel Tiltman and Colonel Maltby to North America

  Held by

  The National Archives, Kew

  Date

  1942 Mar 01 - 1943 Apr 30

  Reference

  HW 57/24