In reply to Levy_danny:
I haven't dome the race, but I ran the Y3P last August in memory of my Father, who spent many happy years wandering the Yorkshire Dales. If you're comfortable on uneven terrain in road shoes, and if the ground is as dry in Yorkshire as it is here in Perthshire (very), you could probably get away with it.
However, soft toe boxes doesn't sound great. The terrain was more demanding than I was expecting (and that was after doing the Lairig Ghru race last June), and I stubbed my toes a lot, to the extent that the damaged nails are only just about grown out now. This may be partly a result of my running style - I don't pick my feet up very well, so any protruding stones have the potential to catch my toes. This was particularly the case on the descent from Ingleborough, when my legs were tired and the paths were not as forgiving as I'd hoped. It's obviously too late now to try different shoes - is it possible/allowed to have an alternative pair available at Ribblehead or Chapel-le-Dale?
Whichever you choose, have a great day, and I hope it goes well for you.