Anyone who thinks the UK can pick the best parts while getting rid of the worse parts of the EU either doesn't fully understand what they are talking about and are just parroting lies from the leave campaign, or are hopelessly deluding themselves.
You cannot have all the benefits without any of the costs. No two ways about it, and the EU will make sure of it.
The rest of the EU will be in no mood to do the UK any favours during exit negotiations. In fact, it is strongly in the EU's own interests to make things as bad for the UK as possible, even if it means hurting their own economies to do so.
They will do that to make an example of the U.K., to show other countries who might be tempted to follow suit just what a god-awful idea that will be.
Encouraging the disintegration of the U.K. would be a strongly advisable play for the EU. All they need to do is promise that any part of the U.K. can remin a part of the EU if they leave the UK and Scotlish independence is pretty much guaranteed, Northern Ireland, Gibraltar, maybe even London may well follow suit.
Such a calamitous sequence of events, or, the very real threat of it, may be enough justification to call a second, snap referendum on EU membership on the grounds that the leave campaign has mounted their entire campaign on lies and loony toon economics, and now that people are truly aware of what Brexit means, a great many people who voted leave are having massive buyer's remorse.
That would be the best case scenario for the EU, and they basically have nothing to loose and everything to gain by going for it.
Even if that doesn't work out, it will still be in the EU's best interest to make an example of the U.K. to stop a domino effective of other countries leaving that could kill the EU itself.
Any economic pain such a draconian policy will inflict on the remaining EU nations could be neatly and easily pinned on the UK for voting out in the first place.
A huge part of the appeal for many, if not most, major foreign countries and companies to invest and set up shop in the UK in the first place was the fact that doing so gave them open access to the EU common market.
Without that, the U.K. Will have a hard time attracting new investment, and may well see a mass exodus of existing companies, especially if Scotish independence occurs, and Scotland fills the niche the entire UK once occupied as the gateway to the EU.
To round off the irony, Scotland will be the one with all the power dictating the terms of their devorce to London under such circumstances, and will probably be able to secure deals even the most boorish Scotlish independence advocate would not have expected back in 2014.
This is like the end of the Shawshank Redemption, but instead of sweet, refreshing rain and a cleansing river, the U.K. is realising that it has escaped the 'prison' of the EU to emerge in a river of shit, and it's raining more shit, for the weather forecast is nothing but shit forever. Well done.