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 the Central Russian Front: of German Air Force (GAF) intentions for April 19; and on GAF operational orders for April 19; on the Russian fronts: reports for April 18; on the Central Russian Front: a XLVI Panzer Corps report and their intentions for April 18-19; on the Russian fronts: a fragment of a XLI Army Corps report for April 18; on the Mediterranean: of a GAF recce on April 18 and of recce intentions for April 19; and Naval Headlines, covering German operations against Arctic convoys and Italian activity.