I will watch Nick Robinson's documentary on immigration this evening (BBC 2 at 9.30) but I feel I already know what he is going to say.

"On the one hand this, on the other hand that, and notwithstanding a few local difficulties, but broadly we all benefit from immigration."

It would be nice to be proved wrong, but that's how I think it is going to go.

That is the establishment line on immigration and it is not likely Nick Robinson is going to vary it.