Top secret papers used to break the Enigma Code were discovered at Bletchley Park - because they were used as draught excluders.

31 January 2015

Revealed : How chilly scientists used top secret papers that broke the 
Enigma Code as draught excluders

- The discovery includes the only known examples of 'Banbury sheets'
- They were devised by Alan Turing to speed up decryption of Nazi codes
- Found in Hut 6 of the codebreaking centre in September 2013 by 
  builders
- They had been stuffed in holes in the walls and ceilings to keep out 
  cold
- Bletchley Park veterans have spoken of freezing conditions they 
  endured 

By Khaleda Rahman for MailOnline

Top secret papers used to break the Enigma Code were discovered at 
Bletchley Park - because they were used as draught excluders.

The papers include the only known examples of 'Banbury sheets' which were 
devised by Alan Turing to speed up the process of decrypting Nazi 
messages. 

They were found in Hut 6 of Britain's main codebreaking centre, codenamed 
Station X, in Milton Keynes, Buckinghamshire, in September 2013 by 
builders who were renovating the unit. 

They are the only examples of Banbury sheets ever to be discovered. 

Top-secret papers used to break the Enigma Code were used as draught 
excluded by cold codebreakers at Bletchley Park. They were devised by Alan 
Turing, left, and portrayed by Benedict Cumberbatch, right

All paper evidence from the codebreaking centre was supposed to be 
destroyed for security reasons, but some paperwork survived after it was 
placed into holes in the walls and ceilings to protect codebreakers from 
the cold.

During the war, Hut 6 had poor heating, no toilets and nothing in terms of 
insulation..../snip/


Read more: 
http://www.dailymail.co.uk/news/article-2934358/How-chilly-scientists-used-secret-papers-broke-Enigma-Code-draught-excluders.html

http://www.thetimes.co.uk/tto/news/uk/article4340369.ece

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