The valve I wanted to replace is stuck fast and I need something with a lot more leverage to break whatever seal is holding it. Sadly because it's in a confined space anything that would offer that kind of leverage is unlikely to fit in there at all. So I left that valve, and pretty much just accept it doesn't work properly. I needed to turn off the previous valve to work on it, so while the water was disconnected I figured I might as well fix the toilet even if I can't fix the defective valve. The valve I wanted to replace leaks water, but only into the pipe. The valve I needed to replace leaks water onto the floor.
Now the leaky valve is replaced, the toilet seems to be working as expected, and no sign of water on the floor as yet. I've left a drip tray in place just in case, but hoping that this time tomorrow it will prove unnecessary. Not sure why it started leaking, maybe it's just old and worn out. I can sympathise with that.
