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 Crete: of a German Air Force (GAF) warning that a British officer PoW stated that a landing operation against Crete was in preparation, on October 7; and on North Africa: that a GAF air recce of the forward front showed no change on October 19.