Lived in France for 25 years  1990-2015 in an area where meters are compulsory.  Taught us to be frugal with  water and recycle all the time eg using a container to trap cold run-off before showering, washing up, and any use of hot water, using washing up/cooking water for the vegetable patch and not flushing the loo every time we had a pee !  The loo also had a half-flush facility - and if it didn't, a brick in the cistern worked a treat.

A well-thought out plan with the Thicket Reservoir being long- needed and overdue - I'm looking forward to what will be an outstanding local amenity.