Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/3777
Conflicts Second World War
Themes Foreign Policy and International Relations, Military Intelligence and Operations
Regions Atlantic, East Asia, Europe, North America, Pacific, South Asia
Countries Albania, Australia, Burma, Canada, Ceylon, France, Germany, Great Britain, Greece, India, Japan, Malaya, New Zealand, Philippines, Poland, Romania, Russia, Singapore, Yugoslavia
Document Type Signals Intelligence, Correspondence
Organisations Government Code and Cypher School, Security Service
People Edward Bridges, Desmond Morton


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 correspondence: from the Japanese minister in Berne, giving views on Japan's future policy, on May 14; from the French Foreign Ministry, noting Anglo-U.S. concern at Soviet actions, especially in Poland, on May 12; and from the Turkish ambassador in Athens, on the Greek internal situation, as of May 19. This file also includes a Naval Headlines report for May 15, with a request from the Prime Minister (PM) to General Ismay for a map and an explanation on the Japanese Shoo operations; and minutes to the PM with a map and an explanation, on May 23-24.


diplomatic intelligence, assessing enemy strength, political intelligence, American strategy, predicting enemy intentions, Allied powers, Japanese foreign policy, surrender, peace proposals, Polish government, Soviet foreign policy, communism, Greek Civil War, naval intelligence, Japanese navy, transportation, Pacific War, naval warfare, aircraft carriers, bombing, Home Front, shipping losses, mines, military dispositions, Japanese army, naval operations, Japanese withdrawal

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