Chris O’Shea has expressed his “horror” following major revelations that prepayment meters (PPMs) were forcefully installed at the homes of vulnerable British Gas customers and stressed that ultimately "I am accountable for this". The Centrica chief executive was speaking following the explosive findings uncovered during an undercover investigation by The Times into the company Centrica uses to pursue debts. Ofgem has launched an "urgent" investigation into what it labelled “extremely serious allegations”.