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 South-east Europe: that 4 German KT ships destined for the Aegean are at various stages of proceeding down the Danube, on April 15; Naval Headlines; from the Japanese consul-general in Vienna, on the destruction of German aircraft factories in Allied raids, on March 3; on West Europe: on the state of reorganisation of seven Panzer divisions in the west, on April 20; and a comment by the Chief of the Imperial General Staff (CIGS), from May 3.