When Sadiq Khan launched his campaign for a third term as Labour mayor of London, he put his green policies front and centre, highlighting his work on air pollution, the climate crisis and nature.
For seasoned Khan watchers, this came as little surprise. The mayor, who last year published a book called Breathe: Seven Ways to Win a Greener World, has been widely praised for his work tackling air pollution, as well as his efforts on nature restoration and getting London to net zero by 2030.