| The Bletchley park cipher is located on plaques of the walls of the buildings and huts in the courtyard at Bletchley park. The cipher-text below appears the same more than once. The cipher is an array of 11 by 16 letters and numbers totalling 176 alpha numeric characters. <pre>HSKOQXRNUDB
 UE6GHNPXKOE
 P5BHKEODH42
 BKUEDRBEOXO
 XHDK94BNSHR
 D4Q4AB46ONX
 9BDEKXBRD8R
 4DMON8AGPNQ
 XEDRHGEOBU2
 PNRBNSHDAEO
 GRGKXONUKXH
 FHBRE5K4NS8
 ABXGKDRGOZH
 4SKAQRB4KAR
 KB6G94PRU8N
 P5R4KA2B4N2</pre>
 Frequency of the letters used is.
 <pre>b : 15
 r : 14
 k : 14
 n : 12
 o : 11
 h : 11
 d : 11
 e : 10
 x : 10
 g : 8
 a : 7
 p : 6
 u : 6
 s : 5
 q : 4
 z : 1
 m : 1
 f : 1</pre>
 A very similar code appears on the backgroud image of the Bletchley park website also. However, the far right column and the last six rows are missing.
 <pre>HSKOQXRNUD
 UE6GHNPXKO
 P5BHKEODH4
 BKUEDRBEOX
 XHDK94BNSH
 D4Q4AB46ON
 9BDEKXBRD8
 4DMON8AGPN
 XEDRHGEOBU
 PNRBNSHDAE</pre>
 
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