Were you a centre-right leader seeking the perfect person to condemn you for implementing a mildly populist measure then a harrumphing Al Gore would surely be about as good as it gets. To have this cold fish, liberal left American jet-setter – known for excusing his own giant carbon footprint on grounds that he purchases ‘offsets’ – leading the elite outcry against his climate change speech must count as a major win for Rishi Sunak.