BIG SIX energy supplier
The company, which is owned by German power giant RWE, lost more than 62,000 domestic customers during the first half of the year, after various surveys found it to be the most complain-ed about supplier of the big six.
"RWE npower continues to focus on improving levels of service for our domestic customers," it said.
"Total number of complaints received by
The company's generation arm posted a £74m loss, due to the closure of older coal and oil-fired power stations last year and the "continued problems with the economics" of its gas-fired power plants.
"The expansion of renewable energy and significant decline in wholesale electricity prices have caused the utilisation and margins of our power plants to deteriorate significantly," said RWE's chief executive Peter Terium.
It maintained its full-year outlook. Shares in the Germanlisted group fell 2.7 per cent at market open.
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