Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/409
Conflicts Second World War
Themes Military Intelligence and Operations, Foreign Policy and International Relations
Regions Africa, Atlantic, East Asia, Europe, Latin America, Middle East, North America, South Asia
Countries Argentina, Brazil, Bulgaria, Chile, Finland, Germany, Great Britain, Greece, Hungary, India, Iraq, Italy, Japan, Libya, Mexico, Persia, Romania, Russia, Singapore, Turkey, United States of America
Document Type Signals Intelligence
Organisations Foreign Office, Security Service, Government Code and Cypher School
People Edward Bridges


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, covering Italian activity; on Japan: a note from Tokyo on the U.S. and joint defence of American countries, from March 4; from Turkey's ambassador in Vichy, views on talk of a Soviet-German armistice, from March 5; and from Portugal's minister in Ankara, on German preparations for a Spring offensive and suggestions of efforts for a settlement, from March 9.


naval intelligence, Italian navy, shipping, convoys, incompetence, diplomatic intelligence, military supplies, Lend-Lease, Axis strategy, operations planning

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