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: German reports from the Anzio beachhead area, on March 14 (4 reports from 3 units); on the Russian Front: of the German Air Force's (GAF's) reconnaissance results for March 14; and a German Army situation report for March 13, describing a critical situation for the 6th Army's southern group in the northern Black Sea coastal area, with considerable Russian advances and the German troops being surrounded.