Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/3570
Conflicts Second World War
Themes Military Intelligence and Operations
Regions Europe, South Asia
Countries Germany, India, Norway
Document Type Signals Intelligence, Correspondence, Reports
Organisations Foreign Office, Ministry of Economic Warfare, Secret Intelligence Service, Government Code and Cypher School
People Thomas Bromley


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 naval attach?n Berlin, an estimate of the German Air Force's (GAF's) strength, on February 22; and a request from the Prime Minister (PM) to the Chief of the Air Staff (CAS) for a note on German aircraft production; the CAS's reply is not included - it was detached by the PM.


German war effort, factories, aircraft, weapons production, effects of bombing, supply problems, war materials, equipment, assessing enemy strength, German air force, German morale, personnel

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