A new online calculator has revealed how much energy bills will rise for millions of UK families from today after the Ofgem price cap rose by more than expected.

The average energy bill for a dual-fuel home paying by direct debit will rise from £1,720 to £1,755 from today - an annual increase of 2 per cent or £35.

The change will impact 35million households on a standard variable tariff for gas and electricity, just as cooler temperatures see many switching on central heating.

Those on a variable rate in England, Scotland and Wales can input their current monthly energy bill into a calculator built by AI money-saving tool Nous.co.

The tool will provide users with an estimated new monthly total and the change in cost, based on the new price cap as well as forecasts for the next 12 months.