Money-saving guru Martin Lewis has apologised for "losing his rag" in a briefing with Ofgem energy regulator staff over coming changes to bills.
The MoneySavingExpert founder had a call with Ofgem this morning after the regulator announced a possible change to how often energy bills will change each year., reports the Mirror.
Under the proposals customers will see energy bill limits reviewed four times a year, rather than two.
Lewis called the changes "a f*****g disgrace that sells consumers down the river" and has apologised saying he should "have behaved better".
On Twitter, Lewis said: "I'd like to formally apologise to the Ofgem staff for losing my rag in a background briefing just now and saying its changes are a 'f*****g disgrace that sells consumers down the river'. I should've behaved better.
"My ire's institutional not individual, it was inappropriate...
"I lost it when getting a briefing about today's proposals, where it feels like at every turn, in these desperate times where lives are at risk, it has ignored all asks for consumers and instead kowtowed to the industry (I hope history proves me wrong)...
"I finished the call by asking it to at least consider cutting standard charges, which huge rates stop people really saving by cutting energy use. I have had good meetings with Ofgem for years, so I'm sorry this blew up (they were calm I wasn't)...
"I pray when I do further analysis I have to apologise again as I've got it very wrong (if not I worry about dire consequences for consumers - we must do more to make things better for them)."
After a consultation, Ofgem hopes that the changes could come into force from October, meaning the first change under the new system would be made in January.
The energy price cap - currently at a record £1,971 per year for the average household - is reviewed every six months and changed in October and April.
Ofgem chief executive Jonathan Brearley has said that proposed changes to review the energy price cap four times a year would mean that bills could go up quicker, but they will also fall more rapidly.