Next thing I knew was the landlady's brother-in-law banging incessantly on the door at 11.30. The landlady had obviously sent him, obviously worried about her water bill. He wanted to know if I had water running, because he'd checked the meter and said it was "spinning round". Of course, I'd been asleep, so I wasn't using any water. There was a minor hiss from the loo cistern, but no visible evidence of water running or leaking. He reckons that the new valve isn't right either ... The upshot is I now have to turn the stopcock on and off to use the toilet. The stopcock outside is turned off to the dribbling water heater too. Washing machine now doesn't have a water supply either and still won't work.
And I'm calling the insurance company again in the morning.