The Climate Change Act is ten years old. It was passed in a different age. David Cameron had been hugging huskies to de-toxify the Tories. It was a year before the Copenhagen Climate Conference. ‘Fifty days to set the course for the next 50 years,’ Gordon Brown declared. China and India’s veto put paid to that, but Britain is still lumbered with a law that puts huge economic power into the hands of an unaccountable body, the Committee on Climate Change, which entrenches climate policy unilateralism.