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 on the Mediterranean: of the German Air Force (GAF) at Sardinia's excuses for failing to attack the fast convoy, on March 10; Naval Headlines; and from the Japanese acting ambassador in Rome, detailing Ribbentrop's talks with Mussolini on the future conduct of the war in the Mediterranean area (2 versions), on March 6.