I use almost no water from the mains, but this made no difference to Castle Water who are more interested in finding ways of hammering their victims with £101 fines for 'non-payment' (I underpaid because I couldn't find how much I owed and apparently paid on the wrong days of the month. Having added a further £202 for the same reason, despite me paying them monthly for the supply of water I don't use, they then added £458 for their debt collectors to threaten to cut off the supply and increase the debt still further. An absolutely disgusting firm, as bad as loan sharks.