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 West Europe: the German Air Force (GAF) Air Commander for the West's evening report, for June 12, stating an attack north of Caen is expected; that the strength of the GAF (2nd Air Corps?) falls to 130, over 50% being operationally ready, on June 12; that the II Parachute Corps' supplies and therefore operations are constrained due to lack of transports, on June 13; and that the 2nd Panzer Division in the Caumont sector is subordinate to the XLVII Panzer Corps, from June 13.