My friend and I will decide Friday morning whether to run, dependant on forecast. Last year I didn't run any races if the temp was less than +10 degrees as I was carrying a hamstring origin injury and that injury has now healed. But I still suffer in the cold, wouldn't mind so much for a marathon but 40 miles is a lot longer out on the course, don't want to risk injury as I have an important target to meet later in the year.
blakester- No, never done Exmoor. I don't do off road events, tough race I believe.