Thanks WP. I think I'll give the gels a miss next time. The lucozade energy tablets seem to do the job for me without the stomach pain.
Strange how it seems to be only the men suffering from leg cramps... it's probably just the people who sweat more but don't compensate with enough fluid. Not sure if muscle strength/size/density/exertion has something to do with it also. Which would certainly explain why I did'nt get leg cramps!