Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/2185
Conflicts Second World War
Themes Military Intelligence and Operations, Foreign Policy and International Relations
Regions Atlantic, Europe, Mediterranean
Countries Azores, Croatia, France, Italy, Trinidad
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: SHARK, for October 28 and 29; on South Europe: of severe damage being caused to a tank factory in an Allied raid on Genoa, on October 30; on South-east Europe: of the transfer of ships from the Aegean to the Black Sea for a German special operation, on October 28; of ships being placed at the disposal of the German 15th Corps for the clearing of islands off of Split, on October 30; that operation WOLKENBRUCH against guerillas in Yugoslavia is to begin on October 31; of the orders for operation WOLKENBRUCH, on October 28, and WOLKENBRUCH III (LINNET 3); Naval Headlines; from the Portuguese minister in Berlin, relating the German reaction to Allied use of the Azores, on October 26; and from the French diplomatic representative in Stockholm, to the Fighting France forces in Algiers, on Germany's plight, as of October 27.


effects of bombing, air raids, ports, operations planning, Eastern Front, shipping, special operations, occupied Yugoslavia, guerrilla warfare, partisans, naval intelligence, German U-boats, Battle of the Atlantic, communications disruption, prisoners of war, Italian army, military organisation, shipping losses, diplomatic intelligence, Portuguese foreign policy

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