E.ON is increasing the cost of its standard variable tariff by an average of 4.8% or £55 for customers taking both fuels from August 16 due to the "significant rise in the cost of wholesale energy", it has announced.

The unit price of its standard variable E.ON EnergyPlan will rise by 6.2% or £36 for electricity-only customers and 3.3% or £19 for gas-only customers.

E.ON last increased its standard unit prices in April last year, but said it had seen increases of 22% for wholesale energy costs since March this year.