Just a heads up to anyone this may be relevant to if they have a water leak and have a metered water supply.
A friend of mine has just suffered this due to a frozen/burst water pipe in an unoccupied house. The water loss was somewhere in the region of 150m3. It just took one letter to Yorkshire Water who have knocked the 150m3 lost water off the next bill. YW say it is a one off goodwill offer but it certainly was worth the cost of a stamp.
And a company should be named for providing a good service, so I name Yorkshire Water for this action. I have no idea how other water companies compare with them so I would be interested if you have had good/bad experiences with other water companies if this has happened to you.