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 Southern Europe: of the results of Allied air raids on the Zara area, on January 22; Naval Headlines, covering 2 U-boats being en route from Toulon to the Anzio area, on January 23; and from the Japanese ambassador in Berlin, a report of January 21 on a large-scale Allied air raid on Berlin, on January 20.