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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.

The UK Archival Thesaurus has been integrated with our catalogue, thanks to Kings College London and the AIM25 project for their support with this.