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: Naval Headlines report number 60, giving intelligence on German and Italian naval activity; this file also includes a comment by Winston Churchill asking for tonnage figures to be included in future headlines.