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 message: from the Assistant Chief of the Air Staff and the Chief of the Imperial General Staff (CIGS) to the Prime Minister and C on the German Air Force (GAF) supply and support situation in Africa. This file also contains Naval Headlines report number 58, covering German and Italian activity in the Atlantic and Mediterranean.