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
Technical aspects of DF operations
Catalogue reference: HW 41/394
What’s it about?
This record is about the Technical aspects of DF operations dating from 1944 Nov 07 - 1945 Sep 26 in the series Government Code and Cypher School: Services Field Signals Intelligence Units: Reports.... 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.
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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 41/394
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Date (When the record was created)
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1944 Nov 07 - 1945 Sep 26
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Description (What the record is about)
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Technical aspects of DF operations
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Held by (Who holds the record)
- The National Archives, Kew
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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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Retained Until 2004
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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
- Radio and television
- Intelligence
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C11202840/
How to order it
- View this record page in our current catalogue
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Series information
HW 41
Government Code and Cypher School: Services Field Signals Intelligence Units: Reports...
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)
458 records
Within the series: HW 41
Government Code and Cypher School: Services Field Signals Intelligence Units: Reports...
You are currently looking at the piece: HW 41/394
Technical aspects of DF operations
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