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: that rigid fuel economy has been imposed on German Air Force (GAF) Africa, on May 17; a summary of German naval operations on all fronts, for May 17; Naval Headlines, that the Prinz Eugen left Trondheim, on May 15; the Ministry of Foreign Affairs in Chungking reports Chinese dissatisfaction with the British, on May 15; a Japanese report of difficulties in transporting Hungarian troops to the Eastern Front, on May 13; a Japanese report of conditions in Russian central Asia, on May 14; on the Turkish military attaché's first impressions of Spain, on May 13; the Italian ambassador in Madrid reports a Spanish minister's belief in an impending U.K.-U.S. attack in north west Africa, on May 13, and rumours of an Allied intention to occupy Turkey; and that decryptions of German infra-red detection devices are to be at the disposal of Kesselring from May 15; with a comment from the Chief of the Air Staff (CAS) on May 20.