But, snowted, the migrants will still come, straight through the tunnel without being stopped in Calais. As soon as the train leaves the station they will be counted as being in Britain. France will not stop them leaving Calais.
Money goes in both directions, and we would spend on red tape and export costs to keep up the trade we now have with EU countries, and our children , grandchildren and greatgrandchildren would lose out on the opportunities for study and work in a larger pool, and contact with their contemporaries abroad.
Previously I was only generally for in, because in a global world isolation is a difficult place to be, but I am becoming more of a inner than an outer as time goes on and I learn more about the subject.
My only reservation would be that I am not that keen to become a "United States of Europe". A friend from the USA made the assumption very early on that Europe was just copying the wonderful example that the US had shown, but the thought doesn't appeal to me. I hope there is a different way forward for Europe.