Ka6crpe
As we have departing Switzeland for non-Schengen airports.
But implementing this at UK airports is going to be a dog's breakfast and, IMHO, only serves to complicate the lives of honest travellers.
Why not direct the airlines to advise whenever a passenger, who has submitted APIS data, does not depart the UK as originally booked? (I'm not really proposing a solution here, that's for experts) it seems to me that the information they need is already there, they just need to get it from the transport companies to the buerocrats.
And maybe we can do away with our controls too.