See http://www.bbc.co.uk/news/uk-28964323 . One of the "benefits" of being a member of the EC is free movement of people across borders. In the case of the UK, already a small and overcrowded little island, we now have far more people coming than going, so there is a large net inwards migration. We should be able to control this but we seem powerless to do so. Our PM has promised to get inwards migration down to 100000 by next year - fat chance I'd say unless we leave the EC.
Both my sons married girls from overseas: one a French girl (the family lives in London) and the other an Australian (family live in Kent).
We should be able to say who comes and goes.