Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/639
Conflicts Second World War
Themes Military Intelligence and Operations, Foreign Policy and International Relations
Regions Africa, East Asia, Europe, North America, South Asia
Countries China, Germany, Great Britain, Hungary, India, Japan, Morocco, Romania, Russia, Siam, Soviet Union, Spain, Togo, United States of America
Document Type Signals Intelligence
Organisations Government Code and Cypher School, Security Service
People Edward Bridges, Adolf Hitler


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 German and Italian activity; from the Japanese consul in Dili, on the situation in Portuguese Timor on June 3; from the Japanese minister in Helsinki on the decline of Finnish-U.S. relations, on June 6; from the Foreign Minister in Tokyo to the Japanese ambassador in Bangkok, on the inability to transport by ship to Siam because safety at sea cannot be guaranteed, on June 6; from the Turkish minister in Chungking on China's war situation, and that Japan is preparing to attack the Soviet Union, on June 12; from the Turkish ambassador in Vichy on German negotiations with Vichy and Madrid on the defence of Morocco, on June 8; from the Turkish military attach� in Budapest on a large increase in Italian forces on the Russian Front, on June 8; from the Turkish ambassador in Berlin on German restrictions on travel to bombed areas, as of June 9; from the Japanese ambassador in Berlin, that the numbers of aircraft in a raid on Cologne were exaggerated by the British, on June 3; with a query from the Prime Minister (PM) to the Chief of the Air Staff (CAS); and CAS's reply.


naval intelligence, military exercises, German navy, warships, shipping losses, mines, German U-boats, Italian navy, shipping, diplomatic intelligence, Sino-Japanese War, Finnish foreign policy, diplomatic signals, security, Japanese strategy, Spanish neutrality, troop movements, Eastern Front, Italian army, diplomatic officials, effects of bombing, air raids, Royal Air Force, German war effort

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