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 South Europe: the naval harbour master at Benedetto reports a heavy bombing attack, on April 18; and German Air Force (GAF) reports on air raids on April 16 and 17; on South-east Europe: a GAF morning and evening raid report for April 17; of air raids on Belgrade and Semlin; the GAF in Bulgaria report a raid on Plovdiv on April 17; and a GAF ground forces report from Sarajevo on the guerilla situation, as at April 17; from the German secret service in Ankara, noting Turkish concern over Roumania and the collapse of the German southern front, that the collapse of Roumania and Bulgaria would create a new situation for Turkey, and describing Turkish troop moves, on April 4; Naval Headlines, covering that German U-boats are not to reveal GNAT torpedoes to the Japanese; from the Japanese naval attaché in Berlin, detailing discussions with a German naval officer on Allied relations with the Iberian countries, the position of east European countries and the second front, on April 6; from the Japanese ambassador in Berlin, outlining an interview with Steengracht on the war situation, giving an optimistic assessment of the situation in the east, on indications of a second front, and that Hitler will not make peace with the Soviet Union, on April 12; and from the Japanese naval attaché in Ankara, passing on the Turkish General Staff's estimate of the war situation, that the Germans are likely to stabilise the Eastern Front, and that the Allies are incapable of launching a second front, on April 14.