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: SHARK, that U-boat cipher keys for April 9-10 have been recovered; on the Mediterranean: a German Air Force (GAF) report for April 10; on North Africa: of the Axis front line as of April 10; GAF Tunis' 2nd evening report for April 10, detailing GAF unit locations; of the GAF's targets for the night of April 10-11; on the Axis front line early and in the afternoon on April 10; and that Kesselring is to arrive in Tunis on April 10 for discussions; from the Japanese minister in Sofia, giving the views of the Bulgarian Minister for War; and from the Brazilian ambassador in London, on a lunch with Churchill.