Thanks for those additional strategic insights Nick. Just to summarise, I should just tuck in and conserve my energy running the first couple of hours at 20km/h pace, then utilising my natural fountain of youthful energy, kick from there on to the finish. Makes sense really as at 44 I'm not getting any younger although I do have some racing flats. Well, they were normal running shoes when I bought them 9 years ago, but they really are flat now.
I reckon as long as I do intervals once a week, shouldn't be a problem. Could even throw in a long run too if I want to be absolutely sure. Any other tips gratefully appreciated. Anything you can add Mike?