Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/570
Conflicts Second World War
Themes Military Intelligence and Operations
Regions Atlantic, Europe, Mediterranean
Countries Cape Verde, Norway
Document Type Signals Intelligence
Organisations Government Code and Cypher School
People Not Defined


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: a German naval report covering all areas, for May 13; that the 4th Air Fleet's battle headquarters are at Kharkov, from May 1; and that the 8th Air Corps is bringing up rear units to support the threatened front at Kharkov, on May 14.


naval operations, shipping losses, German navy, Royal Navy, warships, German U-boats, convoys, military commanders, troop movements, Eastern Front

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