Palindrome Games at Bletchley Park

Brought to my attention in the Language Log,  Which points to a much longer piece on  Palindrome construction games played by the code breakers at Bletchley Park,  as shown in the recent movie about Alan Turing and the Enigma Machine: The Imitation Game.   Still in theaters.  For you text analytics, game playing code breakers out there, this is meaty stuff.  For others, bear with us.   At very least it shows the complex structure and richness of human language.

Longest clever English palindrome (It reads the same in both directions, ignoring spaces and punctuation):

Doc, note: I dissent. A fast never prevents a fatness. I diet on cod