[greatpatton]

EU + UK line are going to disappear when the new EU passport check (ESS) and electronic travel authorization (euphemism introduced by the US to call a visa) will come into force. And now that EU citizen have to do the same for UK it will to just transform a quick Eurostar travel in a big headache.

[OJFord]

ESTA in the US or ETA in Canada doesn't require anything extra in my experience, it's just like a flag either on or not on your passport coming through passport control.

(I assume UK ETA is the same, but I haven't travelled in with anyone requiring one yet. My wife doesn't with a BRP which is also a euphemism for a visa if you like, and that is similarly straightforward.)

[johneth]

You've always needed to go through passport control on Eurostar.

[greatpatton]

Yes of course but without the passport scan + fingerprint + travel authorization.