Health, in particular the NHS, was a key issue in the EU referendum. This project addressed four main research questions. First, how do the laws of the four devolved nations, UK and EU currently interact in the field of health? Secondly, what will the impact be upon domestic health law in the UK when the UK leaves the EU? Thirdly, how will changes to health policy and practice upon UK withdrawal from the EU be managed and what mechanisms will need to be put in place? Finally, what will be the impact on broader international law/agreements on health? These questions were answered by exploring four overlapping substantive areas: public health, mobility, research, pharmaceuticals and medical devices.