Well the only way to truly understand what changes have to take place in order for the UK to fully self govern itself is to understand how the EU operates. Reading the Treaty of Lisbon would be a good start, this will obviously be a long transitional process, not something that happens overnight.
Don't forget the cost benefit analysis of changing EU laws and procedures already in place.
CBA = Benefit(from changing existing law) - Cost(of changing existing law)
If the above is positive, it's worth it to go ahead and change the law. If negative, it's not worth it.
And often a third variable will need to be added, namely if changing the existing law would deny access to the single market:
CBA = Benefit(from changing existing law) - Cost1(of changing existing law) - Cost2(of lost trade due to change)
For some reference, Norway has adopted roughly 75% of EU law to access the single market. So the cost benefit analysis of changing many existing EU based laws might fall to the negative quite quickly.
Everything you say is pure speculation. You don't need to be in the single market to trade with the EU. The UK had a deficit investing and trading with the EU in the single market. Please just admit you have no clue how the EU single market operates.
The exact nature of the future UK trading relationship with the EU is pure speculation. The nature of the single market is not. Neither are the barriers to trade and financial availability from outside. After all only 28 + 4 (or soon 27 + 5 or maybe 27 + 4) nations in the world have access to the single market.
And access to the single market means having free trade IN the single market. Not being able to trade WITH the single market.
And you'd have to NEGOTIATE A TRADE DEAL BEFORE that if you want to do better than default WTO rules.
What's so special about the deficit? Do you think think it's a huge part of EU GDP?
A couple of nations stand to lose quite a bit, but many EU nations not much at all. And they all decide together.
"EU exports to the UK would represent about 3 percent of EU GDP. Only for Ireland and Cyprus does the UK represent more than 10 percent of total exports."Also:
http://www.bbc.com/news/uk-politics-eu-referendum-36270203And financial sector:
http://uk.reuters.com/article/uk-britain-eu-financialservices-idUKKCN0ZH5TEAnd generally single market:
https://next.ft.com/content/1688d0e4-15ef-11e6-b197-a4af20d5575e