If tradesmen work at my home, then the w/c is there to be used by all who need it.. All i ask is its left in the condition it was found. If a difficult custard did object to using the facilities then i would make things just a little bit difficult for them........keeping the water off for a good while and flushing the bog as soon as the water is off would be a good start.........
Had a lad working with me years ago....like a dog, he had to mark his travels by sh1tting in every bog.....and just like every Mackie d eating youngster......he stank like a corpse.
I know every public convenience in my area - although when I've taken the only bog off in the house I've been known to squat over the 4" and aim well!!!
When I was younger living in Ireland I laboured for a couple of spreads.
We were on a building site. Plumbers had done 1st fix. So no bogs were in but a foot of 4" was sticking out the floor ready.
In each house we worked in, all the rubbish from lunch went down the hole.