Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

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: on Panzer Army priorities for the air transport of reinforcements, on July 19; and that the German 90th Light Division report great enemy air activity, on July 21; on the Southern Russian Front: a German Air Force (GAF) report for July 20, describing the Germans advancing; 1206/T13 with the First Sea Lord's (1SL's) reply was sent to the Assistant Chief of Air Staff Intelligence (ACASI) under 181.