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 South-east Europe: a German Air Force (GAF) Command for the South-east situation report for March 1 and 2; on Southern Europe: an extremely heavy Allied raid on San Stefano harbour is reported, on March 2; and of the first reference to a storm trooper formation with French personnel, on February 24.