Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

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: Naval Headlines, covering an Italian report of movement of the Soviet fleet from Sevastopol to Batumi and Poti; that demolition squads are to destroy the naval base; and an analysis of German fleet exercises in the Baltic on October 23-25, involving the Tirpitz, Nuernberg and Koeln.