"Under a raft of promises the party claims will improve border security if it wins the election, the Tories said a new visa waiver scheme called Electronic Travel Authorisation (ETA) would be brought in for EU citizens wanting to travel to the UK."
See: EU citizens will need US-style visa clearance after Brexit as Tories unveil ‘take back control’ border pledges (PoliticsHome, link):
“Under current EU free movement rules, travellers from the bloc only need an ID card to gain entry.
But the new regime will see them asked to bring passports and fill in an online form before travelling, a move the Conservatives said would allow officials to “to screen arrivals and block threats from entering the UK”.”