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 the Mediterranean: a German Air Force (GAF) report on Allied landing craft with tanks; that GAF bombers are to transfer to near Brindisi for the transport of fuel and ammunition, on March 28; and Naval Headlines, covering shipping for Tunisia.