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.
Energy Secretary Amber Rudd has told ITV News that after plunging energy wholesale prices she is "pressing energy companies to put bills down".
She told ITV News Consumer Editor Chris Choi: "I want to see bills continue to come down we have seen some action but nowhere near enough".
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.