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: from the Japanese minister in Berne, giving views on Japan's future policy, on May 14; from the French Foreign Ministry, noting Anglo-U.S. concern at Soviet actions, especially in Poland, on May 12; and from the Turkish ambassador in Athens, on the Greek internal situation, as of May 19. This file also includes a Naval Headlines report for May 15, with a request from the Prime Minister (PM) to General Ismay for a map and an explanation on the Japanese Shoo operations; and minutes to the PM with a map and an explanation, on May 23-24.