Fizz - Immodium can help but speaking from experience it is rarely a complete fix.
You had my sympathy reading that, I have had similar issues many times but never I think *quite* that painful.
It seems for a number of us the guts have been the limiting factor!
Fido, thankfuly i never get runners trots. What happened was I got a prolapse after the first loo visit. The guts behaved well all day thankfully, except for the ones trying to escape !! So cant help you on future advise Im afraid.
Brill reports folks. Think I will link them to the Irish boards, there are a number of people there , now considering the challenge.