As more and more countries raise their ambition on climate action and commit to much stronger nationally determined contributions (NDCs) to achieving the Paris Agreement targets, there has been a resurgence in the debate around Carbon Border Adjustment Mechanisms (CBAMs) and the role they may play in preserving the effectiveness of climate action in high ambition countries. This report explores how the European Union’s CBAM, announced to come into force by the end of 2022, might affect the UK.