Andy Burnham flew to Cop31 in Turkey this week promising a new era of British leadership on climate, and announcing £12 billion of private investment in offshore wind. But, he left behind a Budget that cut £700m from carbon capture and hydrogen, the end of green levies on energy bills, a looming decision on the Rosebank oil field after the Jackdaw gas field had been approved, and reports that the electric car target may be softened.