The deep puddles were on the parts of the course that were away from the reservoir - I particularly recall a sloping path with some steps next to a paddock which was very unpleasant. Also, the bridge over the weir was quite badly flooded too, although obviously less slippery as it is concrete. It's a little way off yet, so there is still time for the route to dry out, but I wouldn't count on it.
I had always suspected the Personal Trainers in our Gym knew nothing about running. This was confirmed when one of them, in response to me saying I was heading out for a 14-mile run, said 'How long will that take? About an hour?'. AND HE WASN'T HAVING A LAUGH WITH ME!!!!