Like Smiths, I always make a point of mentioning the time when I am in the bedroom with the prossie, (Not including the ten minutes it took to climb the stairs due to a broken lift). Along the lines of "Just checking, it's 12:10 and we have one hour booked today". What can they say to that, also if there is clock in the room I will make a point of checking against the time I have and pointing it out if it is set wrong. Of course the best way to avoid all this shit is to book a good prossie who is not a clock watcher or timewaster. I never take the piss but can't remember the last time I was told time is up or it was even hinted at.