Catherine Barnard is Professor of EU law and Employment Law and senior tutor and fellow of Trinity College. She is the author of EU Employment Law (Oxford, OUP, 2012, 5th ed.), The Substantive Law of the EU: The Four Freedoms, (Oxford, OUP, 2016, 5th ed), and (with Peers ed), European Union Law (Oxford, OUP, 2017, 2nd ed). She is currently a Senior Fellow in the UK in a Changing Europe (ukandeu.ac.uk) project. This is an authoritative, non-partisan think tank which does research and provides information about all aspects of Brexit. Part of its remit is to make that information accessible to the general public. So we do a lot of public engagement, especially with the media. She has appeared on the main channels – BBC, ITV, and Sky – as well as some of the more specialized programs such as Law in Action, Woman’s Hour and the Briefing Room. She has also written for the Guardian and the Telegraph. She has given evidence to numerous select committees on the legal issues connected with Brexit, immigration and the European Union (Withdrawal) Act. She has her podcast, 2903cb, and she blogs on Brexit, mainly for the ukandeu.ac.uk.