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 Brigadier LRC Hollis; BONIFACE reports for the Prime Minister (PM); and reports on the Mediterranean: that the German Air Force (GAF) in the Southeast requests reinforcements and an air transport group, on May 13; that the GAF are to fly reinforcements to Milos on May 15-19; of successful Allied air attacks on Aegean shipping, on May 14; that an Allied aircraft sinks a minesweeper off Greece, on May 14; of an Allied air raid on Cagliari, on May 13; and that the Commander in Chief (C-in-C) for the Southeast requests the rapid reinforcing of the Greek area, on May 13.