It doesn't matter. What if they want to see the world? Or just see more than this country? Who are you to take that away from them?(Original post by Trapz99)
Why do you need to study abroad? The UK has some of the best universities in the world. Oxford, Cambridge, Imperial, LSE, UCL and many others are world renowned. Also, as far as I know, the Erasmus scheme will still exist and many universities have been doing year abroad schemes with countries outside the EU so Brexit won't have a massive impact.
From GCSE to A level, it's all changing