Go for it Mark, if my dad can do it then you won't have a problem. He does trail running and park runs with a few local running clubs and is really into it, and counts calories and makes sure he has less than is recommended for a day.

Are you going to do a miles challenge again for the year? I really want to beat Iain this time

Despite my post above I was passing Edinburgh on my way home yesterday, and went into Decathlon and bought a turbo trainer. When I figure out the instructions will hopefully do quite a bit on it over the winter whilst awaiting decent weather