There is much discussion about what the UK government wants in terms of the post-transition relations between the UK and the EU, and the Labour party has now also provided a little bit more clarity on its position. However, to what extent are the different UK-EU Brexit options achievable? Dr Michael Gasiorek explores two key concerns. The first concerns the issue of the compatibility or not of the different UK-EU Brexit options, with the issue of the border between the Republic of Ireland and Northern Ireland. The second issue concerns the subtleties of the difference between being in “the” EU Customs Union, in comparison to being in “a” customs union with the EU. While it might appear a small difference, in practices the differences may be substantial.The aim of this briefing paper is to consider what difference these developments make, to examine under what circumstances might the UK governments current position on future arrangements with the EU be possible (or not), and to offer some recommendations and reflections for the way forward.

Read Briefing Paper 17 – UK–EU trade relations post Brexit: binding constraints and impossible solutions