Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/494
Conflicts Second World War
Themes Military Intelligence and Operations
Regions Atlantic, Mediterranean
Countries Iceland, Malta
Document Type Signals Intelligence
Organisations Government Code and Cypher School
People Not Defined


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 reports: Naval Headlines, that U-boats and destroyers seek Allied convoys in the Barents Sea and north Atlantic.


naval intelligence, German U-boats, warships, shipping losses, mines, Italian navy, Spanish armed forces

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