Do or die? The UK, the EU, and internal/external security cooperation after Brexit

The European Union (EU) integration project is under attack from a reassertion of national sovereignty following Brexit and the Covid-19 crisis. Our analysis examines impact that traditional forms interests will have on conduct EU foreign security policy post-Brexit. We focus challenge to mode regulation diplomacy in internal/external policies Common Foreign Security Policy, Defence Justice Home Affairs. article also considers key scenarios for future UK-EU cooperation inform likely outcomes UK EU. concludes greater through its laws regulations post-Brexit than vice versa not an immediate threat EU's regulatory governance. new realities governance Europe mean weakened EU–UK arrangements, which scope quality beyond defence. This both undesirable potentially dangerous Europe's position wider world.