You asked this in December, I recall.
http://www.theanswerb...s/Question970441.html
Clearly it's not urgent.
I assume you don't work for MI5 but maybe tyou could tell us how the query has arisen as that might help us work out how it should be solved.
Is there any reason why you gave set it out in this way (with some lines having only a few letters ) when the puzzle in your link just shows one long string of letters?
I tried to copy it and it didn't lay it out correctly when I entered it for the question. Apologies about that. All help you can give me will be greatly appreciated.