At long last, COP26 is finally here. Tomorrow, the world’s largest eco-jamboree will begin in Glasgow, with some 20,000 to 25,000 delegates expected to attend. For Alok Sharma et al, it must have felt at times that the ‘last chance’ to save the Earth was being damned by the gods themselves, with strikes, pestilence and vermin all plaguing the rat-infested city in recent months.