What you are talking about Britain's reality. But you underestimate depth of their delusions about their grandeur, power and their ability to punch above their weight. Its for a reason they have been honored with title "White Paki".
You have more idiot AAP like parties in UK. Immigration wont stop else Paki wont bark at its orders. Watch the fun, as Scotland and Ireland seek their own independent destinies again.
Who consumes Tata Steel's produce? Why would EU buy expensive steel from Tata UK plants, when they can source from Tata EU steel plants? UK would have to renegotiate treaties which may take time and toll on Tata UK operations.