0043
Description
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 message: from C to the First Sea Lord (ISL) about the Prime Minister's comments on a report of the tanker Ossag's successful discharging of petrol at Benghazi.