In message , at 12:05:29 on Mon, 23
Jan 2017, Neil Williams remarked:
How would that work? People who have been marked as unwelcome being
met at the gate (in the UK), or is the idea to compel the airlines
not to let them board?

The latter is how it already works.

I suspect the "no-fly" list only has people on it who are regarded as a
terrorist threat, rather than economic migrants.
--
Roland Perry