Its a good shout Noel. Hadn't really considered it. Having said that my favoured running is in wide open spaces, not trashing around in nut-high brambles which seems to be the lot of many orienteering events!
There is a race near me called 4 Fans which I last did in 2017 and made a bit a hash of the nav. Its 12 miles of fairly steady climbing and bog trotting so nothing too arduous but it probably rewards good nav and steady raher than frantic work. I plan to give it a go and get a comparator with my 2017 time.