July 2014
On 26 and 27 July 1939 one of the most important events
in the history of intelligence took place in the woods outside
Warsaw. Just three weeks before the Government Code
and Cypher School (GC&CS) moved to its War Station at
Bletchley Park, its Head, Alastair Denniston, and its Chief
Cryptanalyst, Dilly Knox, travelled to Warsaw to meet
their Polish and French equivalents to share all they
knew about Enigma.
At a commemorative ceremony in Warsaw held earlier
th...
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