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 correspondence on North Africa: a note from C to the Director of Military Intelligence (DMI) referring to the Prime Minister's (PM's) request concerning a map of the German positions as at March 1, see 2423.