0067
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: to the First Sea Lord (ISL) from C answering the Prime Minister's query about Naval Headlines report number 76; and on a signal from the Italian minister in Sofia about possible British demands from Turkey.