Britain’s vote to leave the European Union came as a shock to many in Europe and internationally and raised concerns that Britain is heading towards isolating itself not only from the rest of Europe but taking a more populist, inward-looking, and mercantilist view towards international relations. Supporters of Brexit counter by arguing that in joining the EU, the UK ‘shackled itself to a corpse’ and that leaving will allow Britain and the EU to develop a more constructive relationship while also allowing the UK to return to a foreign policy that is more global orientated as opposed to European focused. As Brexit unfolds the realities for Britain’s approaches to European security, conflict, and development are slowly becoming apparent. In this presentation, Dr Tim Oliver, a noted writer on Brexit and British foreign policy, will discuss why Brexit happened, where relations between the UK and the EU might now be headed, what Brexit could mean for European security, and whether concerns about Brexit and Britain’s isolation and decline are justified.