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: that most German Air Force (GAF) units in Tunisia are to withdraw to Sicily during the hours of darkness, on April 26; that airborne supplies for Axis forces in Tunisia are to be dropped at night over a special drop zone, on April 26; and that 2 Axis landing craft were attacked by Allied motor torpedo boats, with the survivors being brought into Bizerta, on April 26.