Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/3765
Conflicts Second World War
Themes Foreign Policy and International Relations, Military Intelligence and Operations
Regions Atlantic, East Asia, Europe, South Asia
Countries China, Formosa, Germany, Great Britain, India, Japan, Korea, Poland, Russia, Singapore
Document Type Signals Intelligence
Organisations Government Code and Cypher School, Security Service
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: from the Japanese minister in Berne, forwarding advice from the former ambassador to Vichy on Japan's future policy, on May 8; and Naval Headlines.


diplomatic intelligence, Japanese foreign policy, naval intelligence, Japanese navy, naval operations, effects of bombing, aerial attacks, military bases, Japanese-occupied territory

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