The boss of Britain’s biggest energy firm has praised Ofgem for its plans to introduce new capital adequacy requirements and ringfencing, but has called for the rules to be tightened further still. Earlier this week the energy regulator confirmed it was going ahead with plans to bolster financial resilience in the energy retail market. Speaking following the announcement of his company’s H1 financial results, in which it posted a record profit, Centrica chief executive Chris O’Shea welcomed the move by Ofgem.