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 First Sea Lord (ISL): on the Mediterranean, that the Italian Navy is to provide a strong escort for fuel supplies for the German Air Force (GAF) in North Africa, with the GAF to recce and support; this file also includes a comment by the Prime Minister (PM).