In reply to GrahamD:
No, loads of sprinters tried the bob events. Nigel Walker and mark Lewis Francis are ones I remember, and I think Allyn Condon also had a go....im sure there were others as well.
I'll also give a shout out to a friend of mine from Otley, Gill Myers, who didn't represent GB at anything, but has been both British Female Veteran Fell Running champion and British Female Enduro Motorcycling champion at various times.
Theres also Jeff Wilson, who was a test Rugby union and cricketer for Australia in the 90's and 00's.