Energy companies have ramped up their charges since the Brexit vote, putting as much as £105 a year on the cost of their fixed-rate deals.
With the UK a net importer of energy, the falling pound has pushed up the suppliers' costs, and this increase is being passed on to consumers.
The rise was predicted by the Remain campaign, with energy secretary Amber Rudd forecasting price hikes of £20 per household in the event of Brexit. And it now seems it may be worse than that.
According to price comparison site uSwitch, fifteen suppliers have replaced their cheapest fixed rate tariffs with more expensive plans in the last month, with an average increase of £38.
Extra Energy has raised its prices by £105, Sainsbury's Energy by £94, OVO Energy by £63 and First Utility by £48. Twelve of the 15 suppliers have upped their prices since the EU referendum on 23rd June.
It's a reversal of the previous trend.
"For nearly three years, wholesale gas and electricity prices have been falling, leading to cheaper and cheaper fixed term deals for consumers," says uSwitch.com energy expert Tom Lyon.
"But with concerns about future UK energy supply, the impact of Brexit and a weaker pound, we are starting to see some suppliers increase the price of their cheapest deals."
The wholesale prices of gas and electricity had been falling for more than two years, but both began to climb in the second quarter of this year.
This, according to independent price reporting agency ICIS, is due to future energy supply concerns, market uncertainty following the UK's EU referendum result and the falling value of the pound, which makes energy imports more expensive.
With many observers expecting sterling to slip still further in future, uSwitch advises customers to consider a fixed-rate deal to protect against any potential future price hikes.
"There are still some very competitive deals on the market, offering significant savings against the average big six standard variable plan," he says.
Npower, for example, has this week launched its 'Online Price Fix August 2017′ tariff at £786 a year; while First Utility is offering a three-year fixed deal - FU First Fixed June 2019 v2 plus - priced at £999 a year.
Most outrageous bill mistakes
Most outrageous bill mistakes
Carol Sandford, 72, called 118 118 from her mobile phone unaware of the charges involved. Calls to the number cost £1.88 per call and there is also a £2.57 per minute charge from landlines. TalkTalk raises this to £5.68 for the first minute and £3.28 per minute after that. TalkTalk told Carol the charge £81.12 charge was correct but luckily 118 118 were kinder, offering to repay the charge in full. Read the full story here.
One Londoner was more than a little confused when his debit card was declined while he was trying to buy just six bottles of American craft beers. But he quickly realised that instead of the £22.30 he owed, he had been charged £223,000! It's thought he punched in the PIN number before the machine was ready and it added the numbers to the total. Luckily the 28-year-old saw the funny side and laughed the incident off. Read more on the story here.
Early Lewis from Detroit was amazed to find his water bill was almost 100 times as much as he was expecting. The bill claimed that Lewis had used 3,740 gallons of water in just one hour. Thankfully common sense prevailed and the Water and Sewage Department admitted it was a mistake and subsequently charged Lewis the $36 he should have been charged initially. Read more on this story here.
George MacIntosh, 73, was charged a staggering £200 for premium-rate gambling texts he didn't intend to sign up for. Unfortunately this wasn't a scam but a legal service from a company called Zamano. It seems the retired vicar had accidentally signed up after responding to an initial text from the company. Read the full story here.
Philip Groves was amazed to receive a £1,411 bill from Vodafone last year for his 10-year-old daughter Trinity's phone. It turns out Trinity had watched 28 hours of instructional loom band videos on YouTube, assuming her phone was using wifi. But the wifi had cut out, leaving her phone using the data allowance at it's highest rate. Vodafone refused to cancel the bill and threatened legal action. Read more here.
Daniel Pontin was in for quite a shock after opening a gas bill charging him £31,000 for a year's worth of gas in a one-bedroom home. Pontin claimed his meter was broken when he moved in and was initially charged £35 a month for six months before he stopped receiving bills. When the huge £31,000 estimated bill arrived Npower told Pontin to ignore it while they investigated. Read the full story here.