0357

File Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/357
Date 21 January 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 messages: a query and comment from C on a German estimate of the shipping tonnage entering Tobruk harbour from December 12 to January 15 derived from photo-reconnaissance.

Document Title Date
i Front Cover 21 January 1942 Download PDF (400 KB)
1st Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence 21 January 1942 Download PDF (874 KB)
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