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 correspondence: a message to the Prime Minister (PM) from C referring to the separation of U-boat ciphers from the main fleet traffic, and consequential difficulties.
- Collection ID
- HW1
- Conflict
- Second World War
- Document Reference
- HW1 /118/2
- Document Types
- Intelligence Report
- File Reference
- HW1 /118
- Identifier
- 10.1080/swwf.hw1.0118.002
- Keywords
- Wireless Communications Cyphers German U-boats
- Languages
- English
- Organizations
- Government Code and Cypher School
- Pages
- 1
- Published in
- United Kingdom
- Themes
- Intelligence Organization
