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 Norway: that the German Air Force (GAF) has been ordered to carry out protective measures for a German fleet exercise on March 18; and on the Russian Front: a report for March 16 giving a number of apparent Axis successes in several areas.