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: a German Air Force (GAF) report for March 2 on North Africa; intelligence on GAF plans to attack railways from March 2; on possible GAF mining of the Suez Canal on March 2-3; a report that the GAF regarded a particular RAF PoW as a prolific source of information on March 2; on GAF reconnaissance and operations on March 2; a GAF report from March 2 on GAF reconnaissance, operations and intentions; part of a GAF reconnaissance report from March 2; intelligence on Hitler's orders in Norway and Field Marshal List's plan to inspect defence measures from February 26; a report on GAF efforts to fortify aerodromes in the Ukraine, from February 28; messages from the Japanese ambassador in Berlin on German offers of assistance to repair a oil refinery from February 26; from the Japanese minister in Sofia, forwarding Bulgarian reports on Libya, Egypt and Turkey, on February 27; from the Japanese minister in Stockholm on Swedish views on the Yellow Peril, on February 27; from Lisbon to the Portuguese ambassador in London of the Irish chargé's views on relations with Britain and the U.S., on March 1; and from the Turkish military attaché in Kuibyshev on developments on the Russian Front, from February 24.