A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following message: a warning from C to the Prime Minister (PM) concerning the security dangers of passing signals intelligence material to the Soviets; with evidence of tightening of security by German signals units.
- Collection ID
- HW1
- Conflict
- Second World War
- Countries
- Belgium France
- Document Reference
- HW1 /1134/2
- Document Types
- Intelligence Report Memorandum
- File Reference
- HW1 /1134
- Identifier
- 10.1080/swwf.hw1.1134.002
- Keywords
- Anglo-soviet Relations Intelligence Distribution Communications Interception Security German Intelligence Services
- Languages
- English
- Organizations
- Government Code and Cypher School
- Pages
- 2
- Published in
- United Kingdom
- Themes
- International Relations Intelligence Organization Signals Intelligence Code-breaking
