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, with intelligence on German and Italian activity; and a report from the Japanese ambassador in Berlin on the Germans' increasing problems on the Russian Front, from February 8, with orders from the Prime Minister (PM) for it to be shown to the President.