English and Welsh water firms could be forced to return £107m via lower bills

Yorkshire and Thames among providers facing penalties for missing performance targets, but bills could rise elsewhere

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Thames Water, Yorkshire Water and other providers could be forced to cut tens of millions of pounds from household bills after the regulator said they had missed performance targets.

Customer bills at Yorkshire Water could fall by £27 on average, while those at Thames could decrease by £7, according to estimates by Ofwat, the regulator of the privatised industry in England and Wales.