The refugee aspect of it is also amazing - the entire Dublin system is basically designed so that countries like the UK could ship asylum seekers back to first countries like Greece and Italy without giving them due process. Leaving the Dublin system means they’ll have to unilaterally comply with their UN obligations to people asking for asylum at their shores, making it a whole lot harder to get rid of people.

There’s a reason why the European asylum system is as unpopular with human rights activists as it was with the average Brexiteer.