Also, don't forget electrolytes, you'll do a fair bit of sweating so make sure you're taking on salt, i notice my calves cramp when i'm not topping up my salts, I usually stick a tab or 2 of electrolyte in my water bottle for a ride.
tab ? can I just make a home made solution, table salt in water? are the market drinks ok? I always think they are just bollox marketing rubbish, out here there is one called pocari sweat!
@Bernhard, @Heldring @dsalmon thanks. points taken on board.