Bubbly - I'm not absolutely certain (it's complicated), but I think your opinion is somewhat flawed. We have an opt-out. Which is not to say that we have opted out. I'm not clear on where we stand, and it probably depends on whether Labs or Tories hold power. We may not be "bound" but, I think, we are "party" to it.

After that, I simply don't recognise the country you are describing. Especially the last para. Our trains aren't especially slow (except that people are impatient to get everywhere faster), our roads aren't especially pot-holed (no more than they have been for the last 30 years), and so on. Above all, as I have already pointed out, we are NOT the destination of choice for most migrants (as I understand, anyway). And, a lot of the time, the migrants don't destroy their documents - the TRAFFICKERS do!