We literally can't do this

Can we please stop this utter nonsense now ? Please ? A former EU negotiator is quite cross :

"It's insanely complex. It's just insane. I consider myself something of an expert in some aspects of the EU but every time I talk to anybody else who works in the institutions about Brexit, new areas of insane complexity and potentially awful consequences for the UK come up."

"Somebody mentioned to me the other day patents. I had never even thought of patents. But when you start digging down a bit and think about issues like intellectual property rights and so on, these are little areas but these all need to be addressed in 20 months. If they are not addressed in 20 months the consequences for individuals and businesses in the UK will be awful. I've got a long list: medicine approvals, aviation safety, accreditation for service operations for planes, and so many more. Countless agencies governed by the ECJ. The UK may need to put in place entire new agencies for these things within 20 months. You can imagine the consequences of this not being done.

"It gets more complex every day than I thought it would be."

And what about a free trade deal? Brexit Secretary David Davis and others have insisted that they will be able to negotiate both the divorce agreement and a long-term UK-EU trade relationship within the two year Article 50 period.

"The idea that you can have a free trade deal or future relationship sorted within the two years is just absolutely absurd. There is no possibility of that. There could be a divorce agreement and maybe a transition deal if it was very simple. The UK could agree to stay in the EEA for five years, for example. But the UK would have to agree to the package. There just isn't time."

He adds: "They are dealing with Northern Ireland this week. They are dealing with citizens rights this week and the financial settlement too. I can't think that there is going to be a solution to any of them coming this week — and that's another month gone until the next round. Also, don't forget that the agreement can't be reached in March 2019. It has to be reached in October 2018 at the very latest as it will have to be ratified by EU parliaments as well. The idea that the entire deal will be done within the two years I find impossible to believe. Even with the best will in the world, it cannot be done."

http://www.businessinsider.fr/uk/former-eu-negotiator-mays-government-has-handled-brexit-in-the-absolute-worst-way-2017-7/