I don't know if bathroom control would work for me very well, seeing as I can go at least three or four times during an hour. And we're not talking piddling either.
When I am told I can't go to the bathroom, I can actually bring myself to go within five minutes of being told.
Maybe I could be trained in that, but I would suspect that if I had training as Sir Russell does it, we would be in the bathrom the majority of the day.