Like most people, I didn't expect the UK voters to support Brexit. I figured this vote would be like all the other secession votes that come along, with a rejection at the end. But with the vote going the way it did, whatever you think of the idea of Brexit, you will probably agree that there are loads of interesting legal issues involved. Last month, Roger Alford invited a few of us -- Lorand Bartels, Meredith Crowley, Piet Eeckhout, Jennifer Hillman, Rob Howse (via video), me, and Sophie Robin-Olivier -- to the Notre Dame campus in London to talk about it all. The video is here: https://www.youtube.com/playlist?list=PLUqez-g-qh0lEWRv2XxnmZ_MmPRPZTzTD Subjects covered were: UK Brexit Trade Negotiations with the EU, UK Brexit Trade Negotiations outside the EU, and UK Brexit Trade Negotiations and the WTO.
For me, the most interesting new insight was Jennifer Hillman's discussion of how Brexit would affect the ability of the EU and an independent UK to impose anti-dumping duties. It may be that past investigations that are the basis of existing duties no longer have a legal basis, and will need to be redone to take into account the newly separated territories. (That is assuming Brexit goes ahead, of course. We are still awaiting a concrete Brexit plan, and then we will see how everyone reacts.)