i remember racing against dennis in the 80s,i was racing every week and so was he.

i would be intrested to know what criteria is in place,for example support and feeding.
all in one day seems achieveable,subject to a good recce.
i picked up a route guide by gemmel and speakman with link paths and associated walks which seems quite good.

i once came across a chap on hadrians wall section of the pennine way,i ran along with him but only at a distance as he said he was attempting a solo attempt which meant no assistance!he then proceeded to tell me that he had not spoken to his wife for 3 days and he thought she might be worried(this was before mobile phones)
i dont think i want to take it to that extreme,although not speaking to the wife for 3 days,hmmm there is a thought.