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 report for December 4; that Russian prisoners are to work in Tunisia, on December 5; and the Air Officer Commanding (AOC) in Chief South gives a report on the ground situation in Tunisia and Axis intentions to extend the bridgehead, on December 5.