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 North Africa: a German Air Force (GAF) report of October 15 on British and GAF air activity; on Italy: the GAF is withdrawing supplies from Sardinia; a heavy fighter unit is to be withdrawn from Sicily; a naval convoy is to leave Naples for Tripoli on October 16; a version was sent to the Middle East; and Naval Headlines, covering German, Italian and Spanish naval activity.