Comment by graemep

> Probably it will be an app that you install, like the NHS app.

You do not have to use the NHS app. There is a website version.

> Just the same as now, only at the moment you need a paper passport rather than a smartphone.

Which demonstrates how little it achieves. People already need some form of ID for lots of things (notably work and renting housing). It does not have to be a passport though.