Energy bills are often far more complicated than they need to be, according to UK price comparison and switching service uSwitch.

After carrying out a test with a number of UK residents, uSwitch found that 86% of people could not correctly determine the total of their bill.

Of the 2,700 people it tested, 2,400 failed to come to the right total, despite being allowed to use notes and calculators.

The finding has led more than 7,000 consumers to sign a petition calling for simpler bills.