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• Catalogue level

  Piece

  Accessions administration: HW 45

  Accessions administration: HW 45

  Held by

  The National Archives, Kew

  Date

  2001 Jan 1 - 2002 Dec 31

  Reference

  PRO 57/15775

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  5, HW 16, HW 19, HW 45; Naval Section reports of German, Italian, French, Spanish and Portuguese naval decrypts

  Held by

  Date

  1914-1979

  Reference

• Catalogue level

  Piece

  Weekly summary reports on Second World War German army and air force communications

  Weekly summary reports on Second World War German army and air force communications

  Held by

  The National Archives, Kew

  Date

  1945 Jan 13-1945 Feb 03

  Reference

  HW 45/45

• Catalogue level

  Series

  Government Code and Cypher School: Reports on Second World War German Army and Air...

  This series contains weekly reports compiled by the Government Code and Cypher School of details of intercepted German army and air force wireless communications traffic during the Second World War. The reports give details of traffic volumes and cal…

  Held by

  The National Archives, Kew

  Date

  1941-1945

  Reference

  HW 45

• Catalogue level

  Piece

  Security of electronic communications

  Security of electronic communications

  Held by

  Creating government department or its successor

  Date

  1954 Mar-1955 Mar

  Reference

  HW 9/45

• Catalogue level

  Piece

  Billeting for staff at Bletchley Park and Eastcote, Middlesex

  Billeting for staff at Bletchley Park and Eastcote, Middlesex

  Held by

  The National Archives, Kew

  Date

  1939 Aug 29 - 1946 Apr 10

  Reference

  HW 64/45

• Catalogue level

  Piece

  Enemy exploitation of British Army low grade codes and cyphers: miscellaneous reports...

  Enemy exploitation of British Army low grade codes and cyphers: miscellaneous reports and correspondence

  Held by

  The National Archives, Kew

  Date

  1941 Nov 25 - 1943 Sep 30

  Reference

  HW 40/45

• Catalogue level

  Piece

  Naval Section History Editorial Committees and allocation of historical tasks.

  Naval Section History Editorial Committees and allocation of historical tasks.

  Held by

  The National Archives, Kew

  Date

  1946 Jan 24-1946 Jul 31

  Reference

  HW 8/45

• Catalogue level

  Piece

  Reports teleprinted from Malta to the Air Ministry and passed to the Government Code...

  Reports teleprinted from Malta to the Air Ministry and passed to the Government Code and Cypher school giving details of enemy air activity and the results of British air operations

  Held by

  The National Archives, Kew

  Date

  1942 Jan 01-1942 Jun 30

  Reference

  HW 41/45

• Catalogue level

  Piece

  UKUSA Sigint relations: cooperation with FBI on UKUSA intercept and processing of...

  UKUSA Sigint relations: cooperation with FBI on UKUSA intercept and processing of comms from German agents in US, July 17 1940; cautious reply from C to British Military Attaché in Washington on Sigint liaison with US, US keen to exchange but UK less…

  Held by

  The National Archives, Kew

  Date

  1940 July-1941 Dec

  Reference

  HW 14/45

• Catalogue level

  Piece

  Reports based on messages sent on the Italian naval command network

  Reports based on messages sent on the Italian naval command network

  Held by

  The National Archives, Kew

  Date

  1942 Mar 28-1942 Nov 21

  Reference

  HW 18/45

• Catalogue level

  Piece

  GRU (Soviet Intelligence) Military Attaché Traffic: Moscow with London, United Kingdom....

  GRU (Soviet Intelligence) Military Attaché Traffic: Moscow with London, United Kingdom. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1945 Sept 1-1945 Oct 20

  Reference

  HW 15/45

• Catalogue level

  Piece

  Decrypts of intercepted diplomatic communications. Afghanistan: 12970, 12986-12987,...

  Decrypts of intercepted diplomatic communications. Afghanistan: 12970, 12986-12987, 12997, 13009-13010, 13022, 13080, 13109, 13114-13115. Austria: 12859. Brazil: 13021. France: 12943-12944, 12950-12954, 12965, 12971-12972, 12981-12982, 12984, 12994, …

  Held by

  The National Archives, Kew

  Date

  1923 Apr

  Reference

  HW 12/45

• Catalogue level

  Piece

  Details of the German fighter patrol code book derived from traffic analysis and...

  Details of the German fighter patrol code book derived from traffic analysis and voice transcription

  Held by

  The National Archives, Kew

  Date

  1941 May 02-1943 Jul 12

  Reference

  HW 45/50

• Catalogue level

  Piece

  Pay and conditions of GCCS temporary staff

  Pay and conditions of GCCS temporary staff

  Held by

  The National Archives, Kew

  Date

  1922

  Reference

  HW 3/45

• Catalogue level

  Piece

  Weekly reports on Second World War German army and air force communications

  Weekly reports on Second World War German army and air force communications

  Held by

  The National Archives, Kew

  Date

  1942 Aug 15-1942 Oct 02

  Reference

  HW 45/6

• 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

  Dec 12 1941-Dec 16 1941

  Reference

  HW 5/45

• Catalogue level

  Piece

  Commercial reports. Report number 11299 missing at transfer

  Commercial reports. Report number 11299 missing at transfer

  Held by

  The National Archives, Kew

  Date

  1940 Aug 14-1940 Aug 15

  Reference

  HW 29/45

• Catalogue level

  Piece

  Personalities referred to in Romanian Police / Special Service of Information traffic

  Personalities referred to in Romanian Police / Special Service of Information traffic

  Held by

  The National Archives, Kew

  Date

  1946 Oct 15 - 1947 Jun 26

  Reference

  HW 75/45

• Catalogue level

  Piece

  Signals concerned with Bags communications

  Signals concerned with Bags communications

  Held by

  The National Archives, Kew

  Date

  1941 Aug 07 - 1944 Mar 10

  Reference

  HW 51/45