Well said, Roger. In particular, the second point, viz.: is conveniently ignored by those who would use the EU immigration argument as a reason for leaving the EU. Of those with whom I have raised this point in discussion, almost no-one - regardless of their EU stance - has known (or, in some cases, perhaps admitted to knowing) about this. The matter of EU immigration could have been avoided, or substantially de-fused, by some clear articulation of the facts, and some effective action, rather than letting the problem fester.