Energy firm E.On to raise electricity and gas prices

E.On is the last of the major suppliers to raise prices over the winter

Customers of energy firm E.On will see a 9% increase in electricity prices and a 3% rise in gas prices from 4 February.

The supplier said it had "no option" but to raise prices owing to the wholesale cost of energy.

E.On is among five of the "big six" energy companies to add to the cost of bills this winter.

Energy regulator Ofgem is currently investigating the prices charged to domestic customers.