If we wish to be part of the single market we have to allow free movement just like Norway or Switzerland do. My beef about immigration is that tomorrow, we could prevent 150,000 non EU migrants coming to this country. But we don't... Or can't. One can only conclude that immigration control is more complex or difficult than first thought. Also, if we leave, the border at Calais could come back to the UK meaning illegal immigrants and asylum seekers will have to be dealt with here. And once they are here, as we know, it is not straight forward to send them home.