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: of increased precautions being ordered in Italy, from June 25; and that the commander of the bomber units of the 2nd Air Fleet was named, on June 26; on the Russian Front: of heavy fighter crews being employed as fighter pilots in the German Air Force (GAF), on June 25; and Naval Headlines.