Energy suppliers are being urged to stop the 'outrageous' practice of force fitting prepayment meters in UK homes.
Grant Shapps has urged companies to suspend fitting the meters following reports that British Gas had been sending debt collectors to "break into" customers' homes.
The Business, Energy and Industrial Strategy (BEIS) Secretary issued the plea on Thursday evening, shortly after a meeting between his department and the chief executive of Centrica, which owns British Gas, had taken place.
The energy giant said it would stop applying for court warrants to enter customers' homes and fit the meters following reports they had been forced on "vulnerable" people.
EDF said it had also suspended the practice while it reviewed its processes, and Mr Shapps has urged other suppliers to do the same.
He said: "EDF have now confirmed they have suspended the outrageous practice of forced installation of prepayment meters following the investigation into British Gas.
"I am now calling on all the other energy companies to confirm they are following suit."
Energy companies can obtain court warrants which give them legal rights to enter people's homes and fit prepayment meters if customers have not paid their bills.
Customers must then top up to continue receiving gas supplies and, if they fail to do so, they risk their heating being cut off.
BEIS has said that "forcibly switching customers should only ever be a last resort" and it would be "demanding answers to ensure this systemic failure is addressed".
The department said energy minister Graham Stuart met Chris O'Shea, the chief executive of Centrica, on Thursday afternoon, while Ofgem has launched an investigation into British Gas.
Mr Stuart said he has asked Centrica to outline in writing how it will ensure the reported incidents will never happen again, and what role Mr O'Shea will take in fixing "very serious cultural issues" and in "regaining the public's trust".
Mr Stuart said: "I was horrified to read of the mistreatment of British Gas customers - this afternoon I have made it abundantly clear to Chris O'Shea, the chief executive, that this behaviour is completely unacceptable."
"I have asked Mr O'Shea to report back to me urgently outlining the role he will take personally to fix these very serious cultural issues," he added.
"I told him I want to see these vulnerable, mistreated customers identified and redress provided."
The Times reported that British Gas sends debt collectors to "break into" people's homes and "force-fit" pay-as-you-go meters - even when customers are known to have "extreme vulnerabilities".
An undercover reporter for the newspaper worked for debt collecting contractor Arvato Financial Solutions and accompanied agents who used court warrants to gain entry into customers' homes to force-fit these meters.
Some of the "vulnerable" customers the Times reporter came across while working at Arvato Financial Solutions included a single father with three young children and a mother with a four-week-old baby.
Ahead of his meeting with Ms Taplin, Mr Stuart told the BBC: "It's just appalling, it's not good enough. Only last week
British Gas announced steps they were going to take to support vulnerable customers and it turns out they were doing anything but.
"There are clear rules and they've obviously not been followed and, therefore, I need the regulator and the companies to do the right thing by people who are in the most difficult of circumstances and have been treated on this evidence appallingly."
An Ofgem spokesman said: "These are extremely serious allegations from The Times which we will investigate urgently with British Gas and we won't hesitate to take firm enforcement action.
"It is unacceptable for any supplier to impose forced installations on vulnerable customers struggling to pay their bills before all other options have been exhausted and without carrying out thorough checks to ensure it is safe and practicable to do so.
"We recently announced a major market-wide review investigating the rapid growth in prepayment meter installations and potential breaches of licences driving it.
"We are clear that suppliers must work hard to look after their customers at this time, especially those who are vulnerable, and the energy crisis must not be an excuse for unacceptable behaviour towards any customer - particularly those in vulnerable circumstances."
An EDF spokesperson said: "In 2022, we applied for 13,766 warrants in relation to domestic customer debt and in around half of these cases we took the decision not to proceed once the customer had engaged and we understood their circumstances.
"We regularly review and update these processes and so we are confident they are fit for purpose. Nonetheless we are currently reviewing them again to reconfirm they are robust and see if we can make any improvements.
"We have suspended forced installation of prepayment meters while we conduct this latest review."
Simon Francis, co-ordinator of the End Fuel Poverty Coalition, said: "Ministers have fallen for the energy industry's spin that they don't use court warrants to install prepayment meters on vulnerable customers.
"The investigation reveals this not to be the case.
"It is time that the Government stood up to energy firms and banned the forced installation of prepayment meters and the forced switching of smart meters to prepayment mode.
"We also now need a formal inquiry into the prepayment meters scandal and the role of the courts in enabling this practice."
Owner of British Gas, Centrica, announced it was suspending "all warrant activity" after the newspaper's article was published.
The parent company will also launch an investigation into the claims.
Mr O'Shea said: "Protecting vulnerable customers is an absolute priority and we have clear processes and policies to ensure we manage customer debt carefully and safely.
"The allegations around our third-party contractor Arvato are unacceptable and we immediately suspended their warrant activity.
"Having recently reviewed our internal processes to support our prepayment customers as well as creating a new £10 million fund to support those prepayment customers who need help the most, I am extremely disappointed that this has occurred.
"As a result, on Wednesday morning, we took a further decision to suspend all our prepayment warrant activity at least until the end of the winter.
"More broadly, there are clearly significant challenges around affordability and, unfortunately, we don't see that changing any time soon.
"We need to strike a balance between managing spiralling bad debt and being aware that there are those who refuse to pay and those who cannot pay.
"We think government, industry and the regulator need to come together to agree a long-term plan to address this and ultimately create an energy market that is sustainable."
Arvato Financial Solutions has been contacted for comment, as has Energy UK, which represents suppliers.
Hundreds of thousands of customers have been switched over to more costly prepayment meters, often unwillingly and without the offer of support, after failing to keep up with rising energy payments.
Some have found their smart meters switched to prepayment mode remotely while others have been confronted at their door by teams sent by energy companies - armed with magistrates' court warrants - to physically make the change.
Just last week, Ofgem said it is to review the checks and balances that energy firms have around placing customers on prepayment meters, warning it will take further legal action if it finds they are not taking due care.
In a blog, the watchdog's chief executive, Jonathan Brearley, said he is concerned about the "sharp growth in households struggling to pay their bills being switched over to prepayment meters, sometimes without their even knowing about it, leaving them without heating".
Mr Brearley wrote: "The numbers of forced installation of prepayment meters is extremely high. It is simply not acceptable that vulnerable customers are left in the dark and cold in winter.
"This review will focus specifically on self-disconnections, remote switching and forced installations, and the checks and balances companies have around any decision to put a customer on a prepayment meter.
"If we find that they have not taken due care in this process, we will take further legal action against them."
Campaigners say those switched often then go without power as they cannot afford to keep the meter topped up - something that is referred to as "self-disconnection".
It comes after energy bills have soared due to rampant inflation and the impact of Russia's invasion of Ukraine.
