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. The file contains the following reports: of a German Air Force (GAF) request for bombers to be withdrawn from Yugoslavia due to no suitable targets on December 6; and a report from the Japanese ambassador in Berlin on talks with Ribbentrop on the Three Power Pact and its proposed text and Ribbentrop's delight with the Pearl Harbour sinkings, on December 8.