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 Tunis Air Corps' report for March 22 and combat plans for March 23; of concentrated German Air Force (GAF) attacks on all 3 sectors of the front although Axis air operations are being severely hampered by poor weather; and that Allied vessels shelled Gabes, on March 21.