We are on a meter and greatly reduced our bills over 15 or so years now.
We are with Anglian Water and using the So-low tariff.
Until my Daughter in Law tried to go onto the same tariff 2 months ago we were unaware it was being phased out.
No notification from Anglian Water but I see its on there web page.
Not everyone checks out tariff changed, its a bit cheeky of them to sneak it in this way.
http://www.anglianwater.co.uk/household/your-account/tariffs/solow/