It's hard because our government has come up with a load of silly and foolish "red lines" that, among other things, are totally incompatible with the Good Friday agreement in NI. Apart from that, this is our biggest trading partner - it's just idiotic to think we can distance ourselves so much without major economic harm.
How do you know? I don't see why we couldn't, if we stopped being so idiotically xenophobic and anti-EU, be a significant influence on the EU's future development.
Been tried hence the referendum,it will never happen because the EU isn't 27 states in an even partnership,there's France Germany UK Italy Spain and the rest are just hanging in there,Greece literally.