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: of the German Air Force's (GAF) shortage of pilots on July 23; of the GAF's lack of fighter aircraft on July 25; that the GAF at Tobruk have no aviation fuel on July 25; that GAF Crete are unable to re-fuel aircraft from Africa on July 25; and a GAF report for July 25 and their intentions.