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 North Africa: of the Tunis Air Corps' and the 5th Panzer Army's detailed combat plans for February 26, to advance the main Axis defence line in northern Tunisia; the Tunis Air Corps' report for February 25; and of preparations for blowing up a bomb storage area at Gafsa airfield, on February 25; on the Russian Front: a summary report for February 25, noting more Soviet successes; Naval Headlines; from the Japanese minister in Budapest, communicating the Hungarian government's views on the war, from February 20; from the Japanese minister in Helsinki, on Finnish plans to resist a Soviet invasion, from February 9; from the Japanese ambassador in Berlin, detailing the results of a meeting with Ribbentrop on February 19, stating that the Germans are still optimistic for all-out victory on all fronts although they are critical of the Italian and Hungarian armies on the Russian Front - this was report sent to the Japanese ambassadors/ministers in Vichy, Rome, Ankara, Berne and Madrid; from the Turkish minister in Lisbon, a report of February 23, that Hitler has had a fortnight's nervous crisis over the Stalingrad defeat and desires rapprochement with Goering; and that the Belgian minister in Lisbon learns from Madrid that the Russians have given an ultimatum to Spain - withdraw the Spanish Blue Division from Russia or declare war against Russia, otherwise 12,000 Blue Division prisoners will be shot; and from the Japanese ambassador in Berlin, that Ribbentrop leaves Berlin on February 24 for Rome and discussions with Mussolini.