About 2.5 million households in Britain have seen their annual energy bill go up by an average of £116 despite the government fixing prices until April.
According to BBC, those on Economy 7 electricity tariffs, who pay different night-time and day-time rates, saw a 7.6 per cent hike this year.
Suppliers of this tariff can set their own rates and were allowed to increase them on 1 January.
Energy bills soared last year, leading to the government guaranteeing prices.
Under the Energy Price Guarantee, a household using a typical amount of gas and electricity would pay £2,500 annually. This guarantee lasts until April, when it will go up to £3,000.
Source: Jordan News Agency