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: the German Air Force (GAF) at Tunis' evening report for April 3; that the German Navy is to evacuate batteries south of Sfax, on April 3; and GAF Tunis' 2nd evening report for April 3; and on the Southern Russian Front: of German naval problems around Novorossisk, on March 18.