In 2016 the United Kingdom (UK) voted in a referendum to leave the European Union (EU). Whilst the environment did not feature significantly in the referendum campaign it has emerged as a major focus for the UK Government as it prepares for Brexit. Since the UK joined the EU in 1973, its approach to environmental policy-making has been profoundly shaped by processes of Europeanisation. Consequently, disentangling the UK from the environmental acquis communautaire will be a huge undertaking. Whilst the Government has committed to the pursuit of a ‘Green Brexit’ there are on-going concerns that Brexit will lead to weaker environmental ambition and governance. It may also produce policy divergence across the UK as the environmental sector is d...