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
Noise Interception and RCM [radio countermeasures]. Notes on the problems of intercepting...
Catalogue reference: HW 50/54
What’s it about?
This record is about the Noise Interception and RCM [radio countermeasures]. Notes on the problems of intercepting... dating from 1939 Sep 01 - 1945 Apr 18 in the series Government Code and Cypher School and Government Communications Headquarters: Records.... It is held at The National Archives, Kew.
Is it available online?
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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 50/54
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Date (When the record was created)
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1939 Sep 01 - 1945 Apr 18
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Description (What the record is about)
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Noise Interception and RCM [radio countermeasures]. Notes on the problems of intercepting enemy non-morse transmissions and on the formation of the NIB [Noise Investigation Bureau]
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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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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C11205576/
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- View this record page in our current catalogue
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Series information
HW 50
Government Code and Cypher School and Government Communications Headquarters: Records...
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)
149 records
Within the series: HW 50
Government Code and Cypher School and Government Communications Headquarters: Records...
You are currently looking at the piece: HW 50/54
Noise Interception and RCM [radio countermeasures]. Notes on the problems of intercepting...
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