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Subject Source: UK Archival Thesaurus

Found in 1 Collection or Record:


Microfilm copies of "ULTRA" signals

Reference Code: GBR/0014/ULTR
Scope and Contents

Consisting of intelligence from intercepted enemy communications, forwarded from the Admiralty to Allied Commands, "Cairo Series", June 1942-September 1943.

Generally being decrypts from the Government Code and Cipher School at Bletchley Park, Buckinghamshire, using the Enigma machine. The Enigma signals were given a special security classification, "MSS" (Most Secret Source) or "ULTRA".

Dates: 1942-06 - 1943-09
Conditions Governing Access: The collection is open for consultation by researchers using Churchill Archives Centre, Churchill College, Cambridge.