A former partner at Ofgem has said she is still mystified as to why the regulator handed some companies penalties and others rewards under the new business plan incentive mechanism for the RIIO2 price controls. Maxine Frerk said Ofgem needs to provide more clarity on exactly how networks’ business plans are judged. Its chief executive, Jonathan Brearley, told Utility Week some companies had initially failed to show their plans were in the interest of consumers.