In reply to johncoxmysteriously:
I think possibly. KJ is the obvious one.
But previously I can't actually think of any top top runner who has had a go. I know Ricky did in winter and I thought was talking about a summer round, not sure if he ever did it but I think he's had injury issues the past few years.
Nowadays the calendar is just so busy that I don't think many elites want to take time off for a serious go.