Focus on
Olga Gray and the Woolwich Arsenal Spy Ring
In 1938, thanks to years of work by a remarkable female agent, MI5 ensured a package of British defence plans stayed secret.
Series
Government Code and Cypher School: Tactical Sigint forwarded to Allied Commands:...
Catalogue reference: HW 20
What's it about?
HW 20
This series consists of intelligence reports prepared in Hut 3 at Bletchley Park, for transmission to allied commands abroad. These reports were paraphrases of the reports as sent to home establishments, to conceal that they were derived from...
Full description and record details
-
Reference (The unique identifier to the record described, used to order and refer to it)
- HW 20
-
Title (The name of the record)
- Government Code and Cypher School: Tactical Sigint forwarded to Allied Commands: Summaries
-
Date (When the record was created)
- 1940-1945
-
Description (What the record is about)
-
This series consists of intelligence reports prepared in Hut 3 at Bletchley Park, for transmission to allied commands abroad. These reports were paraphrases of the reports as sent to home establishments, to conceal that they were derived from decrypts of enemy cypher messages. Much of the series duplicates reports already released by the Ministry of Defence, but it includes reports which were previously withheld and some additional related material.
-
Related material (A cross-reference to other related records)
-
Summaries of intelligence from intercepted signals sent to allied commands are in DEFE 3
-
Held by (Who holds the record)
- The National Archives, Kew
-
Legal status (A note as to whether the record being described is a Public Record or not)
- Public Record(s)
-
Language (The language of the record)
- English
-
Creator(s) (The creator of the record)
- Foreign Office, Government Code and Cypher School, 1922-1946
-
Physical description (The amount and form of the record)
- 546 volume(s)
-
Access conditions (Information on conditions that restrict or affect access to the record)
- Subject to 30 year closure unless otherwise stated
-
Immediate source of acquisition (When and where the record was acquired from)
-
From 1998 Government Communications Headquarters
-
Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
-
Accruals (Indicates whether the archive expects to receive further records in future)
- Series is accruing
-
Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C9299/
Catalogue hierarchy
Over 27 million records
This record is held at The National Archives, Kew
17,110 records
Within the department: HW
Records created or inherited by Government Communications Headquarters (GCHQ)
You are currently looking at the series: HW 20
Government Code and Cypher School: Tactical Sigint forwarded to Allied Commands: Summaries
You may be interested in
-
-
Focus on
The Spycatcher affair
The book Spycatcher sparked one of the most controversial courtroom battles of the 1980s, bringing questions around state secrecy to a global audience. -
The story of
Anthony Blunt's confession
Security Service files paint a vivid picture of what happened when Anthony Blunt – then employed in the royal household – admitted spying for the Soviet Union.
Related records
Records that share similar topics with this record.