> Now the UK is leaving the EU, he is likely to lose the right to live in France. This is very unlikely. While much about Brexit is unclear, it seems nearly ce

> Now the UK is leaving the EU, he is likely to lose the right to live in France. This is very unlikely. While much about Brexit is unclear, it seems nearly certain that there will be provisions that British nationals can continue living in the EU and vice versa. No country involved wants to change the status for people who already emigrated. Discussions focus more around the exact rights (e.g. if the European Court of Justice remains responsible for EU citizens in the UK) and about movement of people after Brexit. And even if you only move to Europe in a few years, it's likely that you will get a visa much easier than with a non-European passport.