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 the situation in Marknassy will probably necessitate withdrawal from the Matreh sector, on March 25; a German reconnaissance report on motor transport and tanks being established to the south-west of El Hamma, on March 25; a situation report in Tunisia, for March 25; that Kairouan airfield is being cleared of aircraft, on March 25; and Naval Headlines.