As already said, those who are just thinking about immigration have NOT done enough research, the government can currently already control who comes from outside the EU borders and those within the EU borders still have to show their passport when entering the UK, so its already all controllable but you can thank people like Jo Cox (I'm not condoning her murder at all poor woman didn't deserve that)she was pro immigration and all for helping all the people from war torn country's (syria, iraq etc) come here for a better life then things like what happened in Jesmond (Newcastle) happen, immigrants that have been here a couple fo days rape a teenager.
I'm voting out, but not because of immigration, because its not democratic and then there are silly things like some dickhead who makes rules and laws for the EU banned the sale of high power vacuum cleaners (that's just an example, although I do miss my 2000w Hoover )