Boris Johnson is keen to portray the UK as a global leader in environmental policy. But what does his track record really tell us?
Campaigners hailed the ruling as "an absolutely ground-breaking result for climate justice", but Heathrow Airport says it will appeal to Supreme Court.
The UK could find itself off the hook over cases such as breaches of air pollution levels and a failure to act on peat bog burning, which campaigners say can exacerbate flooding.
We can't simply sit back and assume vital protections for healthy air, clean beaches and precious wildlife will remain in place