R (ClientEarth) v Secretary of State for Environment, Food & Rural Affairs, Supreme Court, 29 April 2015, judgment here
Bit of a history to this one, with 5 hearings so far. The short version is that in May 2013, the UK Supreme Court (here), faced with the UK’s non-compliance with EU Directive 2008/50 (nitrogen dioxide etc in air), decide to refer various issues to the CJEU in Luxembourg. In 2014, the CJEU said its piece, (C404-13 and my post here), and its views are now considered by the Supreme Court, hence this second SC judgment.
The UK has been in breach of Article 13 of the Air Quality Directive since 1 January 2010, by not complying with pollution limits in specified areas. ClientEarth, an environmental NGO, sought to enforce the Directive in the national courts. Defra admitted breach of Article 13 and the lower courts said that, given that admission, it was for the EU Commission, if it wished, to take infraction proceedings. The Supreme Court’s 2013 judgement disagreed; it granted a declaration that the UK was in breach of Article 13, and posed various questions about the meaning and enforcement of the Directive to the CJEU.