I do not believe UK will be cut off from world. I like that we focus more and more on internets and modern ways. But take with pinches of salt of what UK govs declare. It is only words and the people have more power than they often realise. The people will not let UK get into such a state. Certainly nothing close to North Korea!

Plus i feel it very unlikely Torys will win election.

I suppose we just have to sit back and wait for it to unravel, deal with problems as they occur. Try not to worry/think about worse case scenarios. Else you will lose your mind trying to guess outcomes. Stay calm. Carry on ;)