I have never done a 1/2 marathon before but I hope to do the GNR in under 2 hours. I did a recent cross country 10k which was a tough course in 53mins and I have done a standard 10k in 48mins.
I did an example project for level 2 exercise and nutrition when I was working in education, this is a link to the Understanding Nutrition part http://theingots.org/community/node/14467 it contains some useful info on nutrition for exercise.
When I was competing power lifting it was always a fine line between eating for energy and not eating too much to make the weight limit. I lifted at 75kgs which is just under 12 stone, so I had to be as strong as I could be while staying under the 75kg weight, which is tough going especially as I am 5ft10" I was about 12% body fat when I was competing.
thanks mate i will have a look at that all help is much apreciated, ive got a number for the gnr myself but not sure if i can get there because of work
in holland there crazy on running you can do a half marathon every wknd if ya like. this year ive done 4 - 10k races 2 - 16k races and an 18.5k race my first time in the 10k was 47mins and i managed to get it down to 42:59 which i was over the moon with but the only thing over here is there aint many hills haha so the gnr is gona kick my ass i reakon, good luck with it mate im sure you wont be the one wearing the filth shirt