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: of the ground situation being little changed, as of April 17; on the Mediterranean: that French naval vessels were raised at Toulon, on April 17; on Yugoslavia: a German day report for April 14; on instructions about measures to relieve the situation around Foca, on April 14; and further German reporting on operations, from April 14.