Personally I think a couple of pints of proper beer is ESSENTIAL nutrtion for fell runners the night before and after a race!
I was reading about Bradley Wiggins a few weeks ago. What shocked me more than the fact he was doing 6 hours a day training on just 1500 calories was that he said he was a beer lover, but was not touching a drop until after the Tour - how gutted will he be if he comes second after that sacrifice!!!!
Longest I've gone without beer since I was 17 was for a week whilst in hospital after shattering my collar bone into six pieces, breaking 2 ribs and puncturing a lung - my running was crap for some time after that and that must have been down to the lack of beer