 National Grid PLC is preparing a response to the Competition and Markets Authoritys CMA provisional determination for the RIIO-2 network price controls framework. The provisional verdict seems to have been the proverbial Curates Egg so far as the electricity grid operator is concerned, with the group pleased to note that the CMA has found in favour of the technical arguments on the so-called outperformance wedge but disappointed that the regulator has not found in favour on the cost of equity. 