Regulators should probe the prices utility firms charge customers, David Cameron will say today.
In a speech to low-wage earners in Reading, the Conservative party leader will say that punters are paying 71 per cent more for natural gas supplies than in 1997, with the average family paying £200 more for gas and electricity compared to the last two years alone.
"The cost of living for working people is going up and up and Labour just doesn't seem to care. So we are campaigning to help people live for less and we're starting with utility bills," Mr Cameron will say.
He will also call for an Office of Fair Trading probe into rising gas prices and demand answers to the apparent disparity between retail and wholesale prices.
"It's not clear that people are being charged a fair price for energy today and we're calling on the competition authorities to investigate," he will say.
The Tories have launched the www.sort-it.co.uk website, setting out how people can 'live life for less'. It provides links to consumer price comparison websites covering food, energy bills and general personal finance advice.