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 South Europe: of an Italian cruiser being sunk in a raid on Ancona, on November 1-2; on South-east Europe: of the sea transport for operation TRAGIC, on November 2; and a German Air Force (GAF) operations and reconnaissance report, for November 3; on the Southern Russian Front: the GAF report a landing on Crimea, on November 2; and of complaints from an SS division, on October 19.