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 contains a message from C to the Director of Military Intelligence (DMI), with a comment from the Prime Minister (PM) for the Chief of the Imperial General Staff (CIGS) (see also 707), on the following report on North Africa: that a Panzer Army interrogation of PoWs reveals fore-knowledge of the German plan of attack, on September 11.