Caroline Flint quit as Europe minister complaining she had been used as "window dressing".
Shadow energy secretary Caroline Flint called for "a complete overhaul of our energy market".
Shadow energy secretary Caroline Flint claimed ministers had shown "sheer incompetence" over the handling of the issue.
Shadow communities minister Caroline Flint said Labour had "not been comfortable talking about efficiency and saving money".
But shadow energy secretary Caroline Flint insisted the government's "warm words" wouldn't "heat homes during a bitter winter".
Labour's shadow energy secretary Caroline Flint reiterated the party's support for nuclear power.
Shadow energy secretary Caroline Flint, for Labour, accused Mr Hayes of "playing politics" with clean energy jobs and the country's energy security.
Shadow energy secretary Caroline Flint warned that "many firms currently providing solar are about to go to the wall".
BBC: Huhne: Policies will soften blow of rising energy bills
Minister for Employment and Welfare Reform Caroline Flint pointed to tax and benefit changes since 1997 designed to alleviate poverty.
Shadow energy secretary Caroline Flint told delegates at her party's conference "the time has come to say goodbye to Ofgem".
Shadow energy secretary Caroline Flint said Mr Cameron had thrown energy policy into "confusion", causing "chaos" in the energy industry.
Housing Minister Caroline Flint said communities often opposed house building in their areas, which was contributing to the lack of supply.
Shadow energy secretary Caroline Flint welcomed the decision to grant planning consent.
Shadow communities secretary Caroline Flint said the select committee's report showed the government's commitment to devolving power was "nothing more than a sham".
Shadow energy secretary Caroline Flint called on the government to use this as an opportunity to encourage investment in nuclear research and design.
But shadow energy secretary Caroline Flint said the changes could amount to a 70% cut in the feed-in tariff (FIT) subsidy in just six months.
Shadow communities secretary Caroline Flint said the court ruling "raises embarrassing questions about the way Eric Pickles ripped up plans for desperately needed new homes".
Caroline Flint, responding for Labour, said the allegations "if true" were an example of "shocking behaviour in the oil market which should be dealt with strongly".
But shadow communities secretary Caroline Flint said that since May 2010, eight Tory councils had abandoned weekly collections and Mr Pickles had been "forced into a humiliating U-turn".
Labour's shadow energy secretary, Caroline Flint, said that if the reports proved to be true, they "suggest shocking behaviour in the energy market, that should be dealt with strongly".
BBC: Gas prices-fixing probe: Government pledges firm action
Caroline Flint, Labour's shadow energy secretary, said that the plans failed to address issues such as excessive charges on private pensions, and costs affecting consumers such as high rail fares.
"Although there will be a reduced risk of serious injury or death when the AEP is used, that risk has not been completely eliminated, " said Home Office minister Caroline Flint.
Caroline Flint, in her first Commons appearance as shadow energy and climate change secretary, said the government was right to carry out the investigation and that Labour welcomed its findings.
Caroline Flint, Labour's shadow energy and climate change secretary, said it was important for the UK to have an energy market that "delivers fair prices and works in the public interest".
Also on Twitter, shadow energy secretary Caroline Flint said she was happy for her former cabinet colleague and his family and made a joke about his nickname, saying "Thunderbirds are go".
Opening the debate, shadow energy secretary Caroline Flint said that instead of helping, ministers were "making things worse" as a result of their decision to cut the winter fuel allowance and subsidies for solar panels.
"The reason that's happened is because of the uncertainty the government has created - that's why firms have put investment on hold, or scrapped it altogether, " said shadow energy and climate change secretary Caroline Flint.
Former Labour minister Caroline Flint said a minister had suggested the reason for allowing defendants to stay anonymous was because of the "stigma" attached to rape - yet evidence suggested the public were "far more hostile" to paedophiles and murderers.
Eric Joyce - who quit as an aide to former Defence Secretary Bob Ainsworth last year in a row over strategy in Afghanistan - is also standing, as is Caroline Flint, who resigned as Europe minister last year and accused Gordon Brown of treating women like "window dressing".
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