Under the new proposal by the Conservatives, industry regulator Ofgem would set a cap for the default standard variable tariffs.
The cap will apply to 17 million families standard variable tariffs.
Greg Clark, secretary of state for business, energy and industrial strategy, said: "We will act on our commitment to intervene when the energy market fails to treat people in a fair and reasonable manner".
Switching rates are certainly increasing but, as we already know, around two thirds of households are still paying much more than they need to because they have not moved to a cheaper supplier or even a less expensive deal.
The PM said five of the "big six" energy companies had recently raised prices while their profit margins hit "record levels".
But when Labour pledged a freeze in 2013, under then leader Ed Miliband, it was dismissed as a "petty socialist campaign" by then prime minister David Cameron.
Britain's ruling Conservative Party said last month it would cap domestic energy prices if it retained power.
Theresa May's party has pledged to limit the amount energy giants can charge customers for their electricity and gas bills, ahead of the General Election.
Centrica said on Monday that it "did not believe in any form of price regulation" and has put forward alternative solutions, while ScottishPower repeated calls on Tuesday for SVTs to instead be scrapped altogether.
Boris Johnson "Miliband says he will imitate the catastrophic policies of the emperor Diocletian, by imposing a price freeze on energy bills for the 20 months succeeding the election".
It said: "Tackling this broken market so that it works for everyone must be the priority for the next government".
Labour has accused the Tories of hijacking its policy, although business secretary Greg Clark, mindful no doubt that the Tories dismissed Miliband's "Marxist" proposals as "irresponsible and risky", has been attempting to draw a distinction between the two plans.
Mr Clark admitted that he is among the millions who never switch provider because it is a "hassle". However, it suggested companies should have information on customers who have stuck on standard variable tariff for more than three years, to encourage them to offer better deals.
"And very interestingly, in the cabinet, two years ago, Mrs May didn't support this policy and she opposed Ed Miliband's price cap".
However, she said she could not promise that her planned cap would guarantee prices do not go up "year on year" but said it would prevent "sudden and unexpected and significant" jumps in the price of gas and electricity.
The prime minister would not be drawn on whether some cabinet ministers opposed the price cap policy.
She replied: "I don't think any government can ever promise that no bill is going to go up year on year". Josh Hardie, its deputy director general, said: "A major market intervention, such as a price cap, could lead to unintended consequences, for example, dampening consumers' desire to find the best deal on the market and hitting investor confidence".
She said he preferred playing basketball with friends to partying. "But they wanted me to find out from them and not the news". The gunman committed the murders while driving one of a handful of cars including a black BMW 5-series and a white Cadillac.
Hanford, which is roughly half the size of Rhode Island, spent decades making plutonium for the nation's nuclear weapons arsenal. A source said "take cover" status was expanded to the entire site at 10:35 a.m.
A JPMorgan analyst (via 9To5Mac ) suggests that the OLED display will be edge-to-edge only horizontally and not vertically. Following this report , a designer Benjamin Geskin came up with a concept iPhone 8 based on the diagrams shown by CLSA.
In his comments at the conference in Istanbul, Erodgan also criticized promises by President Donald Trump to move the US Embassy in Israel from Tel Aviv to Jerusalem, saying the plan was "extremely wrong" and should be "dropped from the agenda".
Remember when I seen him in Mexico and I called him out? A majority of his knockouts have come due to exceptional striking skills. This is the way I push myself back off the ground; this is the way I deal with adversity, and this is the way I get up.
Brent crude was up 34 cents at US$49.44 a barrel at 1410 GMT, having recovered from a session low of US$48.65. OPEC will meet on May 25 in Vienna to determine whether to extend its production cut deal.
Australia treasurer promises fair budget that reins in debt
A senior executive at one of the Big Four banks warned the government of "unintended consequences" of introducing a new levy. But the budget forecast a A$7.4 billion surplus in 2020-21, an improvement on A$1.08 billion at the mid-year review.
Judge agrees to toss Aaron Hernandez's murder conviction
Prosecutors argued during that hearing that Hernandez's conviction in a 2013 murder shouldn't be erased because he killed himself. Additionally, Garsh claimed that there is no proof Hernandez knew that his death could lead to his conviction being dismissed.
Samsung foresees bigger profit in 2017 as memory chips soar
However, it expects overall smartphone shipments to be flat quarter-on-quarter due to decreased sales of mid to low-end products. Samsung has posted its best quarterly profits since 2013 with strong memory chip and display sale, despite Sliding mobile sales.
Missouri Valley Conference invites Valpo to join the league
The Valley has been in a state of transition in the past half decade, after losing power member Creighton to the Big East in 2013. Tickets for the 2017 MVC Softball Championship are on sale now through the Illinois State Athletics Ticket Office.
Mexico, Police Chief Slam Texas Sanctuary Ban
Mexico is Texas' largest trading partner and shares close ties with the state. "They don't really see this as affecting people". He also took the opportunity to counter the claims that this is a " show me your papers " law and is somehow unconstitutional.
Tyson Foods profit falls as plant fires hurt production
The company's net profit margin has achieved the current level of 5.1 percent and possesses 13.5 percent gross margin. Quantbot Technologies LP purchased a new position in shares of Tyson Foods during the third quarter worth $763,000.
Oil slides below $45 as USA shale confounds Opec
Compliance with the cuts has been rising every month, reaching "an impressive 98 percent in March", Al-Aama said. The OPEC-led production cuts haven't made as big a dent in global inventories as intended.
Gas prices take a mid spring dive
Prices on Saturday locally were still 8.4¢ higher than on the same day one year ago, but 13.3¢ cheaper than this time last month. The average price in Columbia is $2.04 per gallon, and in Myrtle Beach the cost is just under $2.06 per gallon.