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: that Ju88 aircraft are expected at Castel Benito in transit, with armourers and bomb fuses to be ready, on April 12; a 23rd Army Corps report of a Soviet forces break-through south west of Rzhev, on April 10; a German Y service report derived from intercepted Russian signals, on April 12; a note from C regarding warning being sent to the Russians; a German secret service report of expected Soviet attacks from Sevastopol and Kerch, on April 12; that German forces in the northern sector of the Russian Front are being supplied by air drops, on April 12; the Italian military attaché in Tokyo reports the reasons for Japanese successes, on April 13; that the Japanese are to requisition French shipping in Indo China on April 9; and the Turkish military attaché in Rome reports on rumoured preparations for a German spring offensive, on April 9.