The line goes that the Best Fencer in the World is not worried about the second best; they're worried about the worst, because they cannot predict what the idiot will do.
Lots of people are getting a certain distance into the UK government's pro-hard-Brexit stance, and how this is playing out in ways that are going to force the EU to economically isolate Northern Ireland in ways the UK government can then use as domestic "blame the EU" exculpation for the economic disaster of a hard Brexit. (And how this is really rash in a good-governance sense and how it's obviously unlawful and so on.)
People doing this analysis tend to be careful, professional, and knowledgeable; something of a handicap when examining mammonite intentions. (Remember that the whole point of mammonism is to make a counterfactual a god. It's not sensible stuff, and it's not followed by sensible people.)
What they're after, what the whole "new global trade", etc. is all about, is going after the legitimacy of national borders with respect to trade.
From people who are completely about national borders with respect to the movement of people this seems odd, but remember they've already done this about capital; barriers to entry (or exit) for capital existed in living memory, and the free movement of capital is a problem (if the capital can move freely and the people can't, you've got a system for producing at best serfdom). But free movement of capital is not enough of a problem if you're a mammonite; the goal of mammonism is to have all the money, and you can't do that if there's a government with the power to tax. So the government has to go, and part of the incremental project of removing the government is to remove the legal framework for having customs and border controls for goods and services. It's quite likely the plan is to declare that the UK has no customs and border controls, won't create any, won't perform any, and will do nothing except check for legality of residence (which if you don't have, they'll murder you).
This presents something of a problem for the EU. (Putin wants to get rid of the EU, remember, and is a significant shareholder in the the UK's Mammonism, LLC rebrand of the Conservative and Unionist Party. This is not solely about a fire-sale looting spree.) Making the UK implement customs checks requires straight-up conquest; impractical against a nuclear power and permanent security council member. Insurance blockade, well, difficult; lots of ongoing and annoying enforcement costs. (Starting with the resulting general starvation in the UK, which will neither affect the the people in power nor look good to the EU's membership.)
There will be US-sourced hulls available to transport UK goods; lots of American mammonites with shipping companies. The short-term cost-optimal thing is to just not bother with customs checks yourself, but that's equivalent to surrendering the European project, so you have to eat the increased cost and commercial drag, which only gets worse as Trump's second term involves declaring a duties-customs-and-fees holiday for everyone except China.
(Which holiday also bans trade with anyone who doesn't reciprocate.)