It was also found that the overall cost of energy for residential customers rose by over a fifth during the same period.
Hilary Benn, the environment secretary, said the findings highlighted how rising gas and electricity costs have made tackling fuel poverty "increasingly difficult".
"Programmes are in place, funding is available and we will continue to do everything we can to help people save money and save energy, both this winter and for the years ahead," he added.
The government recently announced that a new body has been created to protect the interests of energy customers in the UK.
Consumer Focus has been established through a merger between the Consumer Council, energywatch and Postwatch.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.