Defence and security could – under normal circumstances – have been the areas less effected by the British exit from the EU. Brexit did not alter geography, leaving the UK as a power of great importance to European security and defence. Also, every security and defence challenge for EU member states remains strategically important to the United Kingdom. Therefore, the challenge would have been to find pragmatic solutions and policies that enable the EU member states and the UK to work together for the security of their citizens. This looks somewhat different now, no matter from which point of view we assess the situation.