theworriedwell
I'm not sure we can do much about water. We don't have any choice other than if we have a meter and I'm not sure about the rules about that. The rest I've followed his advice in the past and I did make savings so should be worth watching.
There are no rules. You simply ask the water company to install one.
It is many years since we did that, but it halved our water bills.
Many years ago, DD had a water meter installed in the flat she then lived in. When he had finished the job the waterboard engineer realised that he had fitted the meter to the hot water supply pipe and not the main cold water supply and decided that he couldn't be bothered to change it, so she was only ever charged for the hot water she used, and not the cold. As I said, she no longer lives there, she sold the flat nearly 20 years ago, but we do on occasion wonder whether this has been discovered yet and rectified.