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: Naval Headlines; from the Japanese minister in Madrid, that Allied pressure on Spain causes friction in the Spanish cabinet, on February 16; from the Siamese minister in Berlin, that the Germans regard Anzio as a key battle, on February 16; and from the Portuguese minister in Berlin, describing a heavy raid on Berlin, on February 17.