Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/499
Conflicts Second World War
Themes Military Intelligence and Operations
Regions Europe
Countries France, Germany, Italy, Norway, Ukraine
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: on the routes of Flak units moving from France and Germany to the Russian Front, on April 15; and Naval Headlines, covering U-boat activities against convoys in the Barents Sea, and Italian convoys in the Mediterranean.


troop movements, anti-aircraft defence, naval intelligence, German U-boats, warships, torpedo boats, Italian navy, convoys

Cookies Notification

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Find out more.