When I moved back in 2003, I was in a large Edwardian, 50-bedroom house, also had my son and his wife staying with me (His wife was American and considered showering for less than half an hour, was just a quick wash!!(). Had garden hose, etc. etc.
I moved to 3-bed terrace house just a mile away so same borough, same water provider. The house I was moving to did NOT have a water meter, I did at my old house. I discovered that the water charge at the small house was close on DOUBLE what I had been paying with a water meter in the large house.
One of the first things I did once moved was arrange for a water meter to be installed.
Re Economising - think a meter just makes you more aware when you use water. So, I also had a garden water butt put in, and used that when watering pots, etc. instead of the hose. Learned there is no need to have tap running whilst cleanning teetch. Some people go much further, like not flushing loos after every visit. Saving grey water for use in watering garden, etc. Keeping water drained from cooking pots, etc for other uses. I even know of one person who had her washing machine plumbed so the water draining from it went into a garden butt for re-use.