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 reports on South Europe: of orders to destroy Piombino harbour, on June 18; on South-east Europe: that the Admiral for the Adriatic has an acute food situation, on June 17; and that the Admiral for the Aegean suggests new minefields in the Aegean, on June 17.