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 Southern Europe: that an extreme shortage of aircraft fuel justified unloading at a Sardinian port by day, on July 5; on the Russian Front: that the 4th Air Fleet claims notable successes, on July 5; Naval Headlines; from the Japanese ambassador in Istanbul, on Turkey and the war, on July 1; and SHARK: reporting success on June 28.