In reply to keith-ratcliffe:
Whatever they can keep down!
Not that I've done either of those things but variety of food and proper food rather than just sugary shit seems to be important. Roast potatoes or boiled ones tossed in olive oil and salt seem to be a winner.
When I did my Ramsay Round I thought I'd have a craving for something savoury at the supply points so I had Tupperwares of a chickpea curry I'd made at both points. Didn't touch any of it. When I tried the Paddy Buckley I stashed food at the road crossings and included tins of minestrone soup for the same reason but didn't touch that either. However, I think it was a good strategy as you just don't know what you'll want over a 24 hour period and I'm sure multi day runs are different again.
Post edited at 20:13