In fact, none of them worked. They all drained water as slowly as an alcoholic with kidney failure. They have also largely done away with the conventional wash tap. But they haven't quite decided on what should replace it. I'd turned it on.
Some taps have a joystick.
Some have really really stupid push buttons which run only when you have them pressed down, making it impossible to wash both your hands at once. And if you only had one arm, you'd probably need to bother someone into running the tap for you. Not a good look. Now that I'm back in Melbourne, I will just go to the toilet and flush and observe. Okay, it went down clockwise.