In reply to rossowen:
Yes.
Does your company have a disabled toilet? Usually means you can lock yourself in as they have sinks behind the locks, you can have a strip wash.
If they don't have a disabled toilet, turn up tomorrow on cruthches, crap yourself and take them to a tribunal, sue them for making you embarrass yourself in front of your colleagues. They'll soon get one then, and you'll probably be able to claim from claims direct for having had an accident at work!