Labour will also try to make the most of Sam Laidlaw's reaction to Ofgem yesterday when he said the inquiry would threaten investment and could lead to power blackouts.
The Daily Mirror gives a flavour of what's to come, with a pic of Mr Laidlaw's face on a light bulb with the headline "The blackout blackmailer" and "Yesterday this £2m a year energy fat cat had the nerve to claim a probe into fixing their sky-high prices may lead to power cuts… How dare he and his arrogant pals treat us with such contempt".
The Mail has something similar: "British Gas 'blackmail'" Mr Laidlaw can look after himself, but you can see that for politicians of any stripe, but particularly Labour, the plutocrats who are paid loads to keep the lights on are an easy target. It helps that the workings of the energy industry are as complex as the NHS: few in the Westminster village - politicians and journalists - understand them enough to form a reliable view.
If No10 thinks Ofgem has holed the Labour case, they need to get people out there saying so. If the point is that the market is deemed to be sufficiently flawed to require a competition review, then it must follow that Labour's prescription is premature and the consumer - and the markets - would be better served by all parties agreeing to put off a debate until the outcome of the review is known. The Miliband price freeze now looks like a pre-emption of the CMA's eventual conclusions. He may say they fit together, but can he really propose a fix before he knows what he's fixing? Then there's the wider political challenge. Labour in power did nothing to keep the country in power. Mr Laidlaw may be a fat cat, but he's a correct fat cat: the British political market is shaped by political uncertainty and tinkering. If costs are high and investment prospects bleak, it's because politicians have allowed them to be. It is perfectly reasonable to say the energy market is badly constructed and doesn't work, but it does not follow that putting supply at risk by making investment even riskier is the right response.