I thank the right hon. Gentleman for his words. From my experience in government of two and a half years of negotiating on climate change with the European Union, Britain managed to ensure that 27 other countries raised their ambitions to our level. We managed to have leadership at the EU; we influenced America and China; and we influenced the Paris climate change treaty to make it far more ambitious than anyone expected at the time because we were at the European Union table and were able to lead on climate change. Does he realise that, by leaving that table, our influence on this critical issue for our world is being dramatically reduced?