Climate change and nationally significant infrastructure projects: R (on the application of Plan B Earth) v Secretary of State for Transport

In R (on the application of Plan B Earth) v Secretary of State for Transport [2020] EWCA Civ 214, [2020] 2 WLUK 372, the Court of Appeal held that the Secretary of State had acted unlawfully by failing to take into account the UK’s commitments in the 2015 Paris Agreement when he decided to designate a policy formulated to enable the construction of a third runway at Heathrow airport as a ‘national policy statement’ under the Planning Act 2008. An appeal to the Supreme Court is pending. The outcome of that appeal should help to clarify the legal significance of the Paris Agreement and will have significant implications both for expansion at Heathrow airport, for other major infrastructure projects and for other planning and environmental litigation.