Energy firm E.On will increase electricity prices by 7.7% and gas prices by 9.4% from January 18, the company has said.
The average dual fuel price will increase by 8.7%.
All of the major energy companies have now announced a price rise for UK customers.
More top news
Pharmaceutical giant Roche is trialling a new type of treatment which could work better than chemotherapy.
Old Labour firebrand Derek Hatton is now locked in a new fight - to rejoin his old party.
After a career which began with carrying Britain's first nuclear bombs, the last flying Vulcan Bomber is being retired.