I suppose what we have to accept is that we stupidly, over the years signed up for a club that in fact nobody can leave
Having followed the 'debate' on Brexit closely over the last two years, and having seen both sides of the argument, it seems to me that the 'leaving the club' analogy, which is commonly used to illustrate the process, is the most misleading and useless analogy anyone could have come up with. I think that a much more accurate analogy would be that of separating siamese twins.
Siamese twins can be successfully separated if each twin has the necessary organs for sustaining life but no-one in their right minds would consider separating them by just cutting through the join. It requires a lengthy, painstaking and intricate operation to give both of them the best chance of independent survival. Even so, the weaker of the two doesn't always make it. In this case we are the weaker twin.
The essence of the EU is that it is a regulatory body. We are intricately bound to it by rules (which we have contributed to developing) which govern not only trade of goods and services within the EU but often (as with aviation) with the rest of the world through agreements negotiated by the EU. Experts in EU and International Law tried right from the start to warn that disentangling this would be a lengthy and difficult process. But their warnings were airily dismissed as Project Fear or pro EU bias. But they didn't say it couldn't be done, just that it would be difficult and complex.
Unfortunately May has never taken any heed to what the experts were saying. There's never been a 'plan', just a series of aspirations which have completely disregarded the practicalities. I can never make up mind as to whether she is intelligent but supremely self deluding, or just plain ignorant.
The EU have said from day one that we can't cherry pick the bits we like from membership and discard the rest. They have said that they cannot impair the integrity of the Single Market. The Single Market is hailed as one of Thatcher's greatest achievements. I sometimes wonder if our refusal to accept the indivisibility of the 'four pillars' stems from a belief that 'we invented it so we can do what we like with it'...
The EU will be happy to do a trade deal with us once withdrawal is sorted but no trade deal with the EU is going to be as advantageous as the terms under which we trade a members. Nor will they favour us in any way just because we 'used to be a member state'. It would probably violate WTO rules for a start...
Demonising the EU is ridiculous. It is the sum of its members so in effect one is saying that 27 European states are our enemies (but we'd like them to ignore our insults to have a better than anyone else's trade deal with them.) How childish....