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: that Rommel thanks the German and Italian admirals for the acceptance of the new supply programme for Benghazi, on May 3; that German supply columns in Tripoli are to move immediately to Derna, on May 21; and a German Navy situation report of May 22.