Energy firms would have to print the amount of profit they make on every fuel bill under an amendment to the Energy Bill tabled by the Liberal Democrats to be debated by MPs today.
The amendment is one of a series of proposals tabled by the Liberal Democrats to improve consumer rights.
Energy firms would be prevented from exercising a veto over regulatory changes to their operating licences under a further amendment to be debated as the Bill reaches the end of its passage in the House of Commons.
Commenting ahead of the debate, Liberal Democrat Shadow Energy and Climate Change Secretary, Simon Hughes said:
“Customers should have a right to know how much of the bills they pay end up in energy firms’ coffers.
“Both Labour and the Tories talk a lot about the need for people to make informed choices. Today is a chance to show they mean it.
“It’s unacceptable that energy giants have so much control over the body supposed to police them.
“These simple steps would lead to fairer fuel bills through greater transparency and much-needed regulation.”