1/ Yes, only for certain crimes and those should include terrorism and for traitors.
2/ Yes. Just retain a common market, so that they would not have any power over our own justice system, laws, etc.
3/ No. It has been a complete failure.
4/ Yes. Never mind what the Scots want, it would be beneficial to England.
5/ Yes. Our infrastructure cannot cope with any more, only those to be allowed in that have something valuable to contribute to this nation, and that they will be no threat to English jobs.