E.on N Ord Share News (0MPP)

E.On´s Chief Executive, Tony Cocker, said on Wednesday the energy supplier could not guarantee it would not raise prices in the UK this year following a hike in January.The company was the last of the big six energy giants to increase its tariffs at the start of the year and has been fighting claims of over-charging customers ever since.E.On had blamed higher wholesale prices and greater investment commitments for higher bills.Cocker told the BBC's Radio 4 Today programme: "We can't guarantee we won't have to raise prices again this year."His statement came after the company reported a 17% fall in 2012 profits to £235m. Profit margin electricity and gas to domestic customers in the UK was estimated at 2.3%, or just under £27 on an average weighted dual fuel residential bill.The company's sales revenues rose 5.0% to £132.1bn.RD