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 contains a message from C to the Assistant Chief of Air Staff Intelligence (ACASI) for the Chief of the Air Staff (CAS) and the Secretary of State for Air: that the German Air Force (GAF) are to give up 50,000 men to the German Army, from September 26.