> The UK has already toyed with national ID cards. It rejected them in 2010. As Theresa May, then home secretary, explained in 2010: “This isn’t just about cost savings, it’s actually about the principle, it’s about getting the balance right between national security and civil liberties, and that’s what the new coalition government is doing.”

Off-topic, but what is the difference between a passport and an ID card, in terms of civil liberties?