Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/3306
Conflicts Second World War
Themes Military Intelligence and Operations
Regions Atlantic, East Asia, Europe, Mediterranean
Countries Brunei, Germany, Norway, Russia, Singapore
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 Germany: that Army H Group B request German Air Force (GAF) protection for troop arrivals in the areas of Erkelenz, Bedburg and Kal, 15 km west of Muenstereifel, on November 2; and Naval Headlines, covering the Panther Group of U-boats being put on a high degree of vigilance for a Soviet Union-U.K. convoy; and the Japanese convoy SI-MA-04 being attacked by an Allied submarine, with the Hachijin Maru being hit by torpedoes.


inter-services cooperation, German air force, German army, troop movements, Western Front, anti-aircraft defence, naval intelligence, German navy, warships, shipping losses, German U-boats, evacuation, naval bases, Pacific War, convoys, Japanese air force, aerial attacks on ships, United States Navy, Mariana and Palau Islands Campaign

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