> I've read the issue is that some countries require you to renounce your previous nationality to get citizenship, and people have taken advantage of not needin

> I've read the issue is that some countries require you to renounce your previous nationality to get citizenship, and people have taken advantage of not needing a British passport by lying about renouncing their British citizenship. Oh that's an interesting little loophole that might be a[nother] reason. A handful of EU member states disallow dual citizenship, so those taking advantage of "EU and British" might be impacted by this.