I've done the Dean a couple of times before - I nicked the route off the audax site when someone mentioned it earlier this year but I could do the actual audax. Think I did it the week before. The gods punished me for stealing gps tracks :)
EDIT: That's wrong, it was the 3Down, not the Dean.
@hippy, The Dean 300k will come with a gps track. Also comes with an option of two start times; 6am and 7.30am.