The Secrets of Station X (43 page)

Gordon Welchman, the Cambridge mathematician who set up Hut 6 to break the German Army and
Luftwaffe
Enigma cyphers.

The Hut 6 Registration Room, where encyphered Enigma messages were logged before decoding.

The codebreaking exchange deal with the Americans led to a number of US personnel working at Bletchley, in this case a US Army master sergeant.

Hut 6 dictated what links they needed the various British intercept stations to monitor via Bletchley Park Control, run by bright young men recruited from the main London banks.

The breaking of the
Abwehr
(German Intelligence) four-rotor Enigma cypher (
TOP LEFT
) by Dilly Knox was critical to the success of the Double Cross deception operations. Knox died in February 1943 and his role as head of the ISK section breaking Enigma cyphers was taken over by Peter Twinn (
TOP RIGHT
). Keith Batey (
BELOW LEFT
) led the breaking of new machines. Security was so tight that his wife Mavis Batey (née Lever) (
BELOW RIGHT
), who also worked in the ISK section, remained unaware of this work until 2011.

The cast of one of ‘Combine Ops’, the Christmas revues that made use of the many professional actors, actresses, musicians and writers working at Bletchley Park.

The Lorenz SZ42
Schlüsselzusatz
attachment used to encypher German military teleprinter communications.

Robinson
, the first computer used to help to break the
Tunny
encyphered teleprinter messages.

Tommy Flowers, the post office engineer who designed and created the
Colossus
computer.

Bill Tutte who, with the assistance of John Tiltman, broke into the
Tunny
system in a mix of sheer brilliance and good fortune.

Two Wrens, Dorothy du Boisson (
LEFT
) and Elsie Booker (
RIGHT
), operating the
Colossus
computer. 

Max Newman, who was in charge of the Newmanry and devised the system of using computers to do the initial work on breaking the
Tunny
encyphered teleprinter messages.