Pre-pay meter installation to be investigated by Ofgem
More than half a million pre-payment energy meters have been forcibly installed in people's homes over the last six years, according to figures obtained by BBC Radio 5 live.
The energy watchdog Ofgem has said it will investigate the practice, saying it should only be used as a last resort.
Energy suppliers can gain a court order to install a pre-pay meter when customers run up debt.
Nina Warhurst reports.