Want to thank all the people who have answered the question on water meters below. Thanks Gerry McRae for pointing out correct spelling - when it comes to devices used to measure water use, its meters not metres.
A lot of commenters learned about my question through my email list. I have traditionally sent both personal and council emails through this list, but I am now going to maintain a council news and views only email list. If you are interested in receiving occasional emails from me (hoping to be no more than 2 a month), I warmly invite you to join the list: