The real reason for brexit

The focus of the media seems to be that the reason for people wanting to leave the EU is strictly economic, however they seem to be missing the fact that millions of immigrants from the EU and from non EU countries might be the driver.

In a recent poll the out camp seemed was greater than the in camp, why?

There are millions of immigrants in the UK, some estimate that its over 4 million and if current policies stay in place (i.e Britain stays in the EU) things will get worse.

What is the cost of an immigrant coming to the UK?