Four of the Big Six energy suppliers have now raised their prices, with E.ON joining their ranks by pushing gas costs up by 18.1 per cent and electricity prices by 11.4 per cent.
The energy supplier announced the hike today (August 5th), which is due to come into effect on September 13th, meaning customers who do not switch energy providers will be paying an average of £1,190 a year from next month.
Graham Bartlett, managing director of E.ON's Energy Solutions arm, said he knew the price rise "is hard for customers".
"Uncertain times have had a huge effect on wholesale prices, with events in Japan and Libya all having a dramatic effect on gas and power prices in a relatively short period of time," he noted.
To soften the blow, the supplier has launched a two-year fixed rate deal with no premium against standard new prices and no penalties for those who move off the tariff before it comes to an end.
It also announced that Age UK Energy customers will not be subjected to any more price increases until September 2012.
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