British passport holders – as well as other “third-country nationals”, from the US, Canada, Australia and elsewhere – are about to become subject to the European Union’s entry-exit system (EES) which comes into effect on Sunday 12 October. The long-awaited entry-exit system connects every frontier crossing point in the Schengen area (comprising all EU nations except Ireland and Cyprus, plus Iceland, Norway and Switzerland) with a central database. On the first occasion on which a traveller