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- Catalogue level
- Item
Appendix 7 Washington (formerly Appendix G) - see HW 15/49 for message texts
Appendix 7 Washington (formerly Appendix G) - see HW 15/49 for message texts
- Held by
- The National Archives, Kew
- Date
- 1940-1948
- Reference
- HW 15/61/15
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- Catalogue level
- Division
General records of the Government Code and Cypher School
-c7">HW 7, HW 11; Histories of work at Bletchley Park HW 25, HW 43; Special Liaison Units histories
- Held by
- Date
- 1914-1979
- Reference
-
- Catalogue level
- Piece
German code book 13040, used inter alia for encoding Zimmerman message. Transferred...
Transferred from HW 7/9 in August 1995
- Held by
- The National Archives, Kew
- Date
- 1916-1917
- Reference
- HW 3/176
-
- Catalogue level
- Piece
Associated press items and official announcements from Germany, US, Mexico and Japan....
Transferred from HW 7/13 in August 1995
- Held by
- The National Archives, Kew
- Date
- 1917 Mar
- Reference
- HW 3/180
-
- Catalogue level
- Piece
Exchanges between Admiralty and British Naval Attaché Washington on events related...
Transferred from HW 7/11 in August 1995
- Held by
- The National Archives, Kew
- Date
- 1917 Feb-Mar
- Reference
- HW 3/178
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- Catalogue level
- Piece
Records of WF Clarke of Room 40 and Head of Naval Section, Government Code and Cypher...
Transferred from HW 7/15 in August 1995
- Held by
- The National Archives, Kew
- Date
- 1925-1927
- Reference
- HW 3/182
-
- Catalogue level
- Series
Room 40 and successors: World War I Official Histories
Official histories of the First World War from the viewpoint of the various signals intelligence organisations written by Senior Government Code and Cypher School members of staff. The series also includes some semi-official historical papers relatin…
- Held by
- The National Archives, Kew
- Date
- [c1910]-1923
- Reference
- HW 7
-
- Catalogue level
- Piece
Room 40 German decrypts: diplomatic telegrams between Berlin and Mexico routed via...
Room 40 German decrypts: diplomatic telegrams between Berlin and Mexico routed via Swedish diplomatic channels
- Held by
- The National Archives, Kew
- Date
- 1916
- Reference
- HW 7/7
-
- Catalogue level
- Piece
German Army and Navy monitor diplomatic communications and prove German Foreign Office...
Transferred from HW 7/14 in August 1995
- Held by
- The National Archives, Kew
- Date
- 1917 Mar-Aug
- Reference
- HW 3/181
-
- Catalogue level
- Piece
US diplomatic telegrams between London and Washington related to Zimmerman message...
Transferred from HW 7/12 in August 1995
- Held by
- The National Archives, Kew
- Date
- 1917 Feb-Apr
- Reference
- HW 3/179
-
- Catalogue level
- Item
Liaison between German Air Force and German Navy
Liaison between German Air Force and German Navy
- Held by
- The National Archives, Kew
- Date
- [1938 Oct 21-1939 Jan 10]
- Reference
- HW 21/7/7
-
- Catalogue level
- Piece
Internal correspondence concerning security of 'Colossus': notes on BBC programme...
Internal correspondence concerning security of 'Colossus': notes on BBC programme 'The Secret War', 'On Alan Turing and the origins of digital computers' by Brian Randell, with comments, 'Intelligent Machinery' by A M Turing, 'On computable numbers, …
- Held by
- Creating government department or its successor
- Date
- 1972 Apr 01 - 1980 May 29
- Reference
- HW 76/7
-
- Catalogue level
- Piece
Summary reports concerned with World War II in the Far East and its aftermath
Summary reports concerned with World War II in the Far East and its aftermath
- Held by
- The National Archives, Kew
- Date
- 1945 Sep 01-1945 Oct 31
- Reference
- HW 44/7
-
- Catalogue level
- Piece
Appendices agreed at the Technical Conference for the Implementation of the US-British...
Appendices agreed at the Technical Conference for the Implementation of the US-British Communications Intelligence Agreement, 15-26 July 1948. Introduction with Annex A Appendix A, Terms to be used Appendix B, Principles of Security and Dissemination…
- Held by
- The National Archives, Kew
- Date
- 1948
- Reference
- HW 80/7
-
- Catalogue level
- Piece
Ministry of Works (MOW) maintenance work and new projects at Bletchley Park
Ministry of Works (MOW) maintenance work and new projects at Bletchley Park
- Held by
- The National Archives, Kew
- Date
- 1943 Jan 01 - 1945 Dec 31
- Reference
- HW 64/7
-
- Catalogue level
- Piece
Staffing matters including recruitment, deployment and conditions of service
Staffing matters including recruitment, deployment and conditions of service
- Held by
- The National Archives, Kew
- Date
- 1945 Jan 01 - 1945 Jun 30
- Reference
- HW 72/7
-
- Catalogue level
- Piece
Correspondence with the RAF intercept site at Dunstable, Bedfordshire, and the Meteorological...
Correspondence with the RAF intercept site at Dunstable, Bedfordshire, and the Meteorological Office previously located there
- Held by
- The National Archives, Kew
- Date
- 1940 Apr 30 - 1942 Nov 10
- Reference
- HW 54/7
-
- Catalogue level
- Piece
Y Committee, Aug - Dec 1942 Subjects discussed include: liaison with US, including...
Y Committee, Aug - Dec 1942Subjects discussed include: liaison with US, including a US report on the British Y Service Y committees in North and West Africa and the South Atlantic terms of reference for Y Board and Y Committees, at home and overseas…
- Held by
- The National Archives, Kew
- Date
- 1942 Aug 04-1942 Dec 30
- Reference
- HW 42/7
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- Catalogue level
- Piece
Decrypts of messages sent by the Japanese army in S.E. Asia
Decrypts of messages sent by the Japanese army in S.E. Asia
- Held by
- The National Archives, Kew
- Date
- 1945 Jul 01-1945 Sep 30
- Reference
- HW 33/7
-
- Catalogue level
- Piece
Policy on One Time Pads (OTPs)
Policy on One Time Pads (OTPs)
- Held by
- The National Archives, Kew
- Date
- 1947 Mar-1960 Jan
- Reference
- HW 9/7