Lets look at this issue of immigration with figures, the UK population was 51M in 1955, 60 years on, its 64M, which means without immigration, the population will have been in the decline.
At our peak rate of growth its still less than 1% per year, yes we need to control immigration but this rate of growth is not something our government should not be able to cater for.
USA in the same period has almost doubled in population from 174M to 320M.
So many reasons to vote out, this is the least of them.