Rishi Sunak has been accused of a "massive failure of leadership" after pulling out of attending a major climate summit in Egypt next month.
It comes just 24 hours after the UN warned the planet is heading for a "climate catastrophe" and urged world leaders not to put climate change on the "back burner".
Former Prime Minister Liz Truss had reportedly planned to attend November's summit in Sharm El-Sheikh, Egypt, where world leaders will meet.