Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

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: a German Air Force (GAF) post-mortem on an Allied interception of ME-323 heavy new transport aircraft, with nothing to add to the report of April 23, that GAF fighters did not see the air battle, and the ME-323 transports did not keep to their planned course; C informs the Prime Minister (PM) that this message explains the recent Allied success against 20 new large Messerschmidt transport aircraft; Naval Headlines; from the Turkish ambassador in Rome, that Mussolini had gone to Sicily and Rommel, who had come from Germany, Admiral Donitz and the Italian Chief of the General Staff, General Ambrosio, had talks with him in Taormina; that Mussolini returned from Sicily on April 19 and then headed north on his special train, allegedly en route to Germany from Rome; and on a dispute over the Tunisian campaign, that the Germans wished to fight to the end while the Italians desired to pull out, with great friction arising between the German and Italian armies, on April 21; from the Japanese minister in Madrid, a report of April 20 containing a special intelligence report on an extract from a report originated by the Spanish ambassador in London highlighting the threat of a Communist uprising in Britain; and C informs the PM that U-boat communications for April 22 and 23 were exploitable by U.K. sigint analysts.