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• Accessions administration: HW 35

  Held by

  The National Archives, Kew

  Date

  2000 Jan 1 - 2002 Dec 31

  Reference

  PRO 57/15766

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

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/13

• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• 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

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

  Held by

  The National Archives, Kew

  Date

  1942-1945

  Reference

  HW 35

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

  Held by

  The National Archives, Kew

  Date

  1935 Jan 01 - 2008 Dec 31

  Reference

  OS 69/363

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

  Held by

  The National Archives, Kew

  Date

  1935 Jan 01 - 2008 Dec 31

  Reference

  OS 69/365

• 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

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

  Held by

  The National Archives, Kew

  Date

  1942 Aug 19-1942 Oct 05

  Reference

  HW 41/35

• 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

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

  Held by

  The National Archives, Kew

  Date

  1942 Apr 21-30

  Reference

  HW 14/35

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

  Held by

  The National Archives, Kew

  Date

  1942 Apr 06 - 1945 Aug 05

  Reference

  HW 50/35

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

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1944 Dec 31

  Reference

  HW 57/35

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

  Held by

  The National Archives, Kew

  Date

  1943 Jan 04 - 1944 Jun 29

  Reference

  HW 53/35

• Security of electronic communications

  Held by

  Creating government department or its successor

  Date

  1954 June-1956 Feb

  Reference

  HW 9/35

• Accidents involving Bletchley Park staff

  Held by

  The National Archives, Kew

  Date

  1941 May 28 - 1944 Feb 13

  Reference

  HW 64/35

• 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

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

  Held by

  The National Archives, Kew

  Date

  1942 - 1944

  Reference

  HW 11/35

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

  Held by

  The National Archives, Kew

  Date

  1936 Jan-1937 Apr

  Reference

  HW 17/35

• 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