Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/522
Conflicts Second World War
Themes Military Intelligence and Operations, Foreign Policy and International Relations
Regions Africa, East Asia, Europe, Mediterranean, Middle East, North America
Countries China, Crete, Croatia, Egypt, England, France, Germany, Great Britain, Greece, Italy, Japan, Libya, Malta, Montenegro, Serbia, Sicily, Sweden, Togo, United States of America
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 on North Africa: of German Air Force (GAF) intentions for April 25 in response to an expected British ground forces attack; on the Mediterranean: that the GAF AOC (Air Officer Commanding) in Chief South is concerned at a report that British bombs are more effective, on April 22; on Yugoslavia: a German operational report for April 23; from the Turkish ambassador in Tokyo on U.S. air raids on Japan, on April 22; from the Italian ambassador in Santiago on the situation in the U.S., on April 18; from the Turkish ambassador in Rome on anti-Fascist feeling, on April 20; from the Turkish minister in Stockholm on German assurances regarding Sweden, on April 22; from the Turkish consul in Batumi on the local situation, on April 22; from the Japanese minister in Santiago on Press reporting of air raids on Japan, on April 20; from Tokyo: a comment on U.S. air raids on Japan, on April 18; on the Mediterranean: a GAF operational and recce report for April 21, and that a new bomber unit is in Greece; of the GAF AOC in C South on a new bomber unit going to Greece, on April 21; the Chief of the Air Staff's (CAS's) reply to the Prime Minister's (PM's) query on the new bomber unit in Greece, on April 23; and Naval Headlines, covering German and Italian activity.


special operations, Desert War, aerial attacks, siege of Tobruk, German air force, effects of bombing, high-explosive bombs, military operations, partisans, diplomatic intelligence, public opinion, American war effort, military commanders, Italian army, Swedish neutrality, defence, troop movements, radio navigation, naval intelligence, German U-boats, warships, Royal Navy, torpedo boats, Italian navy, shipping losses

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