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 Southern Europe: the 1st Parachute Corps' situation report, for March 6; and on South-east Europe: that a special undertaking, operation WIGAN, to capture Vis island by night parachutists is intended for the end of March, reported on March 6.