I suspect that Ratter may have fallen into the error I used to make when I first went to live in Scotland, of using the all-encompassing term "English" when what we really meant was "British" which includes all indigenous UK citizens. Ratter, forgive me if I'm wrong and you DID mean "English" only, but I know that was how my misinformed mind used to consider it 40 years ago.
I'm no more worried that we have been with each wave of immigrants coming through and to our small town - we saw all the Poles come in, who are now hardworking in our local area, then the Slovaks (who couldn't work and DID cause animosity, but have nearly all now moved on), then the Czechs - who are settled and working here. If those of our population who can't be arsed to work are threatened by people who WILL work, then they should take those jobs (and I know several people who've never worked in recent years). It's the anticipated crime wave with does bother me, having to have everything bolted down again, if what we hear is true - and we must differentiate Romanians from the Roma people, who are already here.