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• Catalogue level

  Piece

  Accessions administration: HW 35

  Accessions administration: HW 35

  Held by

  The National Archives, Kew

  Date

  2000 Jan 1 - 2002 Dec 31

  Reference

  PRO 57/15766

• Catalogue level

  Item

  Appendix 5A Sofia - see HW 15/35 for message texts

  Appendix 5A Sofia - see HW 15/35 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/13

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  COMMUNICATIONS SECURITY: Radio security service HW 35; Communications security HW 40; German signals intelligence Second World War

  Held by
  Date
  1914-1979
  Reference

• Catalogue level

  Piece

  Reports of decrypts of Japanese military attachés messages

  Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1944 May 02-1944 May 06

  Reference

  HW 35/35

• Catalogue level

  Series

  Government Code and Cypher School: Military Section: Reports of Japanese Military...

  This series contains reports of decrypts of signals of attachees at various posts world-wide.

  Held by

  The National Archives, Kew

  Date

  1942-1945

  Reference

  HW 35

• Catalogue level

  Piece

  Triangulation (Trig) Station number NC/35/T2. Trig name: Sula Sgeir: tertiary mark....

  Triangulation (Trig) Station number NC/35/T2. Trig name: Sula Sgeir: tertiary mark. National Grid reference: HW/63 (10 km square at 1:25000 scale)

  Held by

  The National Archives, Kew

  Date

  1935 Jan 01 - 2008 Dec 31

  Reference

  OS 69/363

• Catalogue level

  Piece

  Triangulation (Trig) Station number NC/35/T3. Trig name: Rona Lighthouse: tertiary...

  Triangulation (Trig) Station number NC/35/T3. Trig name: Rona Lighthouse: tertiary mark. National Grid reference: HW/83 (10 km square at 1:25000 scale)

  Held by

  The National Archives, Kew

  Date

  1935 Jan 01 - 2008 Dec 31

  Reference

  OS 69/365

• Catalogue level

  Piece

  Japanese military messages passed between Tokyo and Stockholm

  Japanese military messages passed between Tokyo and Stockholm

  Held by

  The National Archives, Kew

  Date

  1943 Oct 03 - 1945 Jul 04

  Reference

  HW 35/111

• Catalogue level

  Piece

  RAF Middle East summaries describing enemy operational activity, transport movements...

  RAF Middle East summaries describing enemy operational activity, transport movements and fuel supply on all fronts

  Held by

  The National Archives, Kew

  Date

  1942 Aug 19-1942 Oct 05

  Reference

  HW 41/35

• Catalogue level

  Piece

  Decrypts of Japanese army and army air force messages

  Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1944 Aug 01-1945 Apr 02

  Reference

  HW 52/35

• Catalogue level

  Piece

  Security officers to be appointed for each hut; security breach involving signal...

  Security officers to be appointed for each hut; security breach involving signal from Hut 3, all copies to be destroyed; security talk by DCSS to all staff following careless talk by 2 former GCCS staff; Sir Alexander Cadogan of FO asks Minister of L…

  Held by

  The National Archives, Kew

  Date

  1942 Apr 21-30

  Reference

  HW 14/35

• Catalogue level

  Piece

  Communications Dossier No 3, Far East - USA - Japanese Army/Air and Naval Sigint....

  Communications Dossier No 3, Far East - USA - Japanese Army/Air and Naval Sigint. Details of world-wide communications networks set up to support the Sigint effort against Japan

  Held by

  The National Archives, Kew

  Date

  1942 Apr 06 - 1945 Aug 05

  Reference

  HW 50/35

• 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

  1944 Jan 01 - 1944 Dec 31

  Reference

  HW 57/35

• Catalogue level

  Piece

  American Liaison 1943. Correspondence mainly between A G Denniston, Head of Operations...

  American Liaison 1943. Correspondence mainly between A G Denniston, Head of Operations at Berkeley Street, title Deputy Director (Civil) [DD(C)], and British liaison officers in Washington and senior US Sigint authorities

  Held by

  The National Archives, Kew

  Date

  1943 Jan 04 - 1944 Jun 29

  Reference

  HW 53/35

• Catalogue level

  Piece

  Security of electronic communications

  Security of electronic communications

  Held by

  Creating government department or its successor

  Date

  1954 June-1956 Feb

  Reference

  HW 9/35

• Catalogue level

  Piece

  Accidents involving Bletchley Park staff

  Accidents involving Bletchley Park staff

  Held by

  The National Archives, Kew

  Date

  1941 May 28 - 1944 Feb 13

  Reference

  HW 64/35

• Catalogue level

  Piece

  German section: reports of German army and air force high grade machine decrypts

  German section: reports of German army and air force high grade machine decrypts

  Held by

  The National Archives, Kew

  Date

  Oct 20 1941-Oct 27 1941

  Reference

  HW 5/35

• Catalogue level

  Piece

  Vol. XXII The Black Sea by Frank L Jones; edited by Lieutenant Commander L A Griffiths,...

  Vol. XXII The Black Sea by Frank L Jones; edited by Lieutenant Commander L A Griffiths, RNVR

  Held by

  The National Archives, Kew

  Date

  1942 - 1944

  Reference

  HW 11/35

• Catalogue level

  Piece

  Decrypts of Comintern messages: Moscow, USSR, with Basle, Switzerland. (Described...

  Decrypts of Comintern messages: Moscow, USSR, with Basle, Switzerland. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1936 Jan-1937 Apr

  Reference

  HW 17/35

• Catalogue level

  Piece

  Reports of decrypts of Japanese military attachés messages

  Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1943 Mar 11-1943 Apr 01

  Reference

  HW 35/4