Ofgem, the energy regulator, has launched an urgent investigation into British Gas following allegations the company sent debt collectors who broke into customers’ homes to install prepayment meters.

It comers after an investigation by The Times that alleged a company used by British Gas to pursue debts, Arvato Financial Solutions, had forced their way into homes to fit the devices, despite signs children and disabled people were living there.

“These are extremely serious allegations from The Times. We are launching an urgent investigation into British Gas and we won’t hesitate to take firm enforcement action,” an Ofgem spokesperson said.

The boss of British Gas owner Centrica told the BBC that he is horrified that debt collectors have broken into customers’ homes to fit prepayment energy meters without consent.

“This happened when people were acting on behalf of British Gas. There is nothing that can be said to excuse it,” Chris O’Shea told the BBC.

The firm will stop such installations.

O’Shea told BBC Radio 4’s Today programme: “The contractor that we’ve employed, Arvato, has let us down but I am accountable for this.

“This happened when people were acting on behalf of British Gas. There is nothing that can be said to excuse it.”