0641

File Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/641
Date 12 June 1942
Government Department Government Code and Cypher School
File Accession Date 1993

Description

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) intelligence report from a particularly reliable source on U.S. complaints about RAF technical deficiencies in Egypt, on May 29, with a query from the Prime Minister (PM) to the Chief of the Air Staff (CAS); CAS's reply as the PM calls for a report; a signal from the Middle East suggests that German intelligence was obtained in Washington or from the breaking of a U.S. cypher message; CAS explains to the PM that the evidence is clear that U.S. cyphers are being read and that action has been taken, and that the allegations against the RAF were found to be false.

Document Title Date
i Front Cover 12 June 1942 Download PDF (227 KB)
1st Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence 12 June 1942 Download PDF (2.00 MB)
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