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 Turkish military attaché in Kuibyshev, that there is no news of any Japanese attack on the Soviet Union as such reports are propaganda, on October 20; and Naval Headlines, covering German troop transports being torpedoed, and German criticism of Italian convoy management.