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: of an Allied air attack on [Pola], on April 13; and of Allied air attacks on Monfalcone, Pola and the Yugoslav coast, on April 13; on South-east Europe: of an Allied air attack on Agram airfield, comprehending German Air Force (GAF) aircraft losses, on April 13; the Germans report that Danube traffic has been paralysed by mining, on April 11; a GAF evening report on raids, on April 13, covering the Ferihegy aircraft works being heavily damaged; and that German garrisons on the Aegean islands and the west Greece coast are to prepare defences against commando raids, including Hitler's order concerning the powers of naval and fortress commanders in the event of an Allied attack, on April 14; on the Southern Russian Front: that 23,000 Germans await evacuation from Sevastopol, with an additional 10-12,000 to arrive in Sevastopol daily, on April 12; Naval Headlines; from the French delegate in Ankara to DiploFrance in Algiers, that the Germans are to defend Roumania because of the importance of petrol from Ploesti, on April 8; from the Portuguese minister in Hungary, describing the evacuation of Budapest after Allied bombing, on April 10; and on Turkey: that the Turks expect bombing of railway bridges in Thrace to impede the export of Turkish chrome to Germany, on April 12.