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 the Russian Front: the German supreme command of the armed forces ordered the move of the XI Paratroop Corps to southern Russia on December 5; the U.K. warned the Soviets; and Naval Headlines, covering German, Italian and Spanish activity.