This is a question that government money creation (aka MMT) has to take on board if you are a net deficit country (without using US reserve currency!) such as the UK.
When we import about 40-60% of our food – indeed, the last figure is more relevant in the hungry gap period of April and early spring– just when we are due to leave the EU.
And with an existing almost 7% trade deficit we are, actually playing with fire.
Not that we are not capable of withstanding this – probably, as long as the UK has the Rule of Law, it will survive. But the UK’s reputation for political stability has undoubtedly taken a hit – why would, as recent statistics suggest they do not, foreign investors now want to invest?
In effect we need foreign investors, in either our physical assets or our financial ones, because we need food.
So we need to keep close our food suppliers – as they are both the most reliable, and indeed the closest and nearest. This effectively is the EU.
And all those fine, shiny new trade agreements will of course be modelled on existing EU trade agreements.
And the EU has, perhaps accidentally, discovered how valuable they are. So that is why they rather wish the UK good luck in renegotiation them.
“Why should I invest in your country?” is a devastatingly important question, when your food depends on it.
The answer to that question – I can see no other – has to be the Rule of Law.
If we do indeed leave the EU with anything that calls this in to doubt we are no longer likely to be functioning as a country.
It is, in any case, as I understand it, an international treaty.
Not only our Human Rights but potentially our ability to eat, actually depend on the Rule of Law.
When we have way more difficult local challenges, Brexit has engendered unnecessary – but very, very demanding times.