Apparently there was a "dry run" of the new Heathrow Terminal 5 recently and it appears that it didn't all go according to plan. Indeed, some people didn't get to go at all.
The baggage handlers (the people who make sure your luggage gets to Dubai while you're on a plane to Dubrovnik) apparently don't have any loos.
According to The Foreman they:
had to travel up two levels to relieve themselves. There were murmurs that it might be a permanent situation when the all-singing all-dancing terminal opens for real next year.BAA were quick to stamp on those suggestions, assuring me there would be no need for baggage handlers to go in 'thunder boxes'. "There will be toilets for everyone throughout the building," a spokeswoman told me. Welcome relief for the baggage handlers no doubt.