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) declare Ain el Gazala a prohibited area for flying on October 16; a Panzer Army report for October 18; that Berlin asks the Panzer Army about a British document instructing commandos to shoot prisoners, and that the Panzer Army has no knowledge of such instructions, on October 17-18.