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 the German Air Force (GAF) are preparing for night operations south of Sollum and over Tobruk, on May 24; and the Naval Headlines, covering German preparations to attack Arctic convoys, Italian fears of a British landing on Crete, and Spanish activity on the Eastern Front.