1134

File Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/1134
Date 22 November 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 message: a warning from C to the Prime Minister (PM) concerning the security dangers of passing signals intelligence material to the Soviets; with evidence of tightening of security by German signals units.

Document Title Date
i Front Cover 22 November 1942 Download PDF (358 KB)
1st Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence 22 November 1942 Download PDF (595 KB)
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