David Cameron has told MPs energy prices are not falling as fast as he would like to reflect the fall in oil prices.
The Prime Minister's comments come as a new survey claims three in five older people will ration their heating this winter amid fears over bills.
With Britain braced for falling temperatures there are calls for energy companies to pass on savings they are making from the decline in the wholesale cost of fuel.
But despite plummeting commodity prices benefiting energy firms, consumers' bills have hardly moved.
ITV News consumer editor Chris Choi reports.
Three in five older people will ration their heating this winter amid fears over high energy bills, according to a new survey.
Older people have been warned to keep their homes warm and get a flu jab as weather experts warn of a cold snap.