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: of a request from the German Air Force (GAF) in Africa pressing for the use of gliders for motor vehicle transport; a report of aircraft fuel and lubricant stocks and consumption rates in Libya; and of the delayed sailing of the tanker Ossag on September 6 due to bad weather.