In its formal reaction to Paris today the Committee on Climate Change declined to update its advice on the level of the 5th carbon budget despite admitting that the Paris agreement was more ambitious than the UK’s current commitments. Instead it has adhered a budget which it claims is aligned with its current statutory goal of cutting emissions by 80% in 2050, but, according to campaign group Sandbag, the Committee’s own analysis shows that the proposed budget fails even this modest test.