Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/408
Conflicts Second World War
Themes Military Intelligence and Operations
Regions Africa, Europe, Mediterranean
Countries Italy, Romania, Russia, Sicily, Ukraine
Document Type Signals Intelligence
Organisations Government Code and Cypher School
People 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 on the Mediterranean: a German Air Force (GAF) report of an attack on a British naval formation on March 11; and on the Russian Front: that German ground forces repelled Soviet attacks on March 11; and that the GAF are to provide extra anti-aircraft protection for railways, from March 12.


military situation reports, aerial attacks on ships, Royal Navy, defence, counter-attacks, Red Army, invasion of the Soviet Union, anti-aircraft defence, railways

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