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.
Piece
Portuguese naval messages
Catalogue reference: HW 18/166
What’s it about?
This record is about the Portuguese naval messages dating from 1943 Nov 20-1944 Jan 17 in the series Government Code and Cypher School: Naval Section: Reports of German, Italian, French,.... It is held at The National Archives, Kew.
Is it available online?
No, this record is not available online. However, you can order a copy. Other ways to view it.
Can I see it in person?
Yes, this record is held at The National Archives and is available to see in person. How to view it.
Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
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HW 18/166
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Date (When the record was created)
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1943 Nov 20-1944 Jan 17
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Description (What the record is about)
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Portuguese naval messages
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Note (Additional information about the record)
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Decrypts of high grade cypher messages
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Held by (Who holds the record)
- The National Archives, Kew
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Former department reference (Former identifier given by the originating creator)
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ZTPP 1-16
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Legal status (A note as to whether the record being described is a Public Record or not)
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Public Record(s)
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Access conditions (Information on conditions that restrict or affect access to the record)
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Open Immediately
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Closure status (Whether the record is ‘open’ (available to the public) or ‘closed’ (not available due to a legal exemption))
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Open Document, Open Description
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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))
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- Topics
- Intelligence
- Navy
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C6024933/
How to order it
- View this record page in our current catalogue
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- Select an option and follow instructions
Series information
HW 18
Government Code and Cypher School: Naval Section: Reports of German, Italian, French,...
See the series level description for more information about this record.
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)
488 records
Within the series: HW 18
Government Code and Cypher School: Naval Section: Reports of German, Italian, French,...
You are currently looking at the piece: HW 18/166
Portuguese naval messages
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