The Climate Change Committee (CCC) has urged the government to resist the temptation to use past over-performance on meeting its statutory carbon budgets as an excuse to loosen the UK’s future emission reduction ambitions. In a letter to Graham Stuart, minister of state for energy security, the CCC interim chair Professor Piers Forster congratulates the government for meeting its statutory target to cut emissions in the third carbon budget period, which covered 2018 to 2022. UK emissions were 391 MtCO2e lower than allowed for in this period, making it the second successive “surplus” that the UK has achieved on its carbon budgets.