Oddly, though, the "concern" is very different depending on the age groups you talk to. An obvious concern, and it is expressed at the end of Nick Clegg's film, is what happens if or when the (presumably younger) people who are dissatisfied with their lot, find that Brexit hasn't made them any wealthier, or freer, and, for the older things have not reverted to "how they used to be".
It will take years, possibly generations to turn the UK (in whatever form it may be) into a low-migration economy, tho something tells me what will not happen.
An interesting film mikey, thanks.