Hi @marckee, a little update for you on the stopcock sitch.
I totally forgot to test it until Sunday morning, the day before the bathroom fitter was due to start.
Obviously I tried to turn it and it was completely solid.
I sprayed it with WD40 then read that that is the worst thing to do, as the issue is not rust or corrosion, it’s typically limescale within the tap. All I’d done was make it more slippery to handle.
But I waited ten minutes then tried it again with a pair of pliers. Got it to budge a fraction, then slowly worked it back and forth until it was running okay. It turned off the water.
My wife did not kill me, but it was looking very much like she would for a while.