The way that the legislation from the Climate Change Act 2008 has been framed means that impact assessments are not needed specifically for the SI. We did not have an impact assessment when we moved from 60% to 80%, because the risk is incumbent on Government in making the legislation. The impact assessments that are needed under the framework of the Act arise through the carbon budgets themselves. We have already legislated for carbon budgets 1 to 5, to 2032. The framework for carbon budget 6 will be recommended by the independent Committee on Climate Change ready for next year: it needs to be implemented by June 2020. There will be a full impact assessment on the next period, 2032 to 2037.
Following the point made by my hon. Friend Sarah Newton, it is the carbon budget process that needs the certainty in place for businesses and society to plan ahead. Any impact assessments that are made will reflect carbon budgets 6, 7 and 8. The Treasury is also taking forward its own independent impact assessment of the wider costs to business and society. That work is ongoing and will be presented at the time of the spending review.