Parts of East Anglia - whose water is supplied by Cambridge Water, Essex and Suffolk Water and Veolia Water East - are also no longer classed as in drought, following the review by the Environment Agency.
There are no water restrictions in place for their customers.
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The competition watchdog has blocked Sainsbury’s £12 billion merger with Asda on the grounds it would result in higher prices for consumers.
Heavy showers will ease this evening
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