If we leave “without a deal” - what happens?
We cease making any payments to Brussels for “dues”, and just settle any accounts private business-private business, which has nothing to do with the government, if no tariffs are put on.
Once the payments cease, the EU has a choice of either halting all trade between the UK and the EU (they won’t and can’t) or sticking punitive tariffs on everything, which will be painful for businesses actually on the continent trying to keep in touch with home, rather than those based here in the uk, who can shift to further afield customer bases. They’ve had three years to get ready, after all…
The EU isn’t going to actively put any “Embargo” in place, as this would be an act of war, and even in a limited trade war - the UK has the means to “hurt EU trade” a lot more than the EU can hurt UK trade.
The EU also is NOT going to be building any “Wall” or other “Hard Border” between Northern Ireland and Eire - meaning we just carry on as before, until the EU has the stomach to tell the Irish “WE are going to stop YOU from trading with the UK” - once again, “sounds remarkably like an embargo”…
In short, the “downside stuff” isn’t going to be implemented by the EU, as they just won’t have the stomach and political will (let alone “access”) whilst the UK won’t NEED to put anything in place. We’ll just carry on trading as before. The wall is NOT going to be built.
Finally, there’s no need to cough up £39billion as the EU can “ask” like I can ask you for £1million for my house, or £50k for my car… If you have to buy - you’ll PAY it. If the UK government feels we HAVE to pay £39billion - then the idiots might just pay it, because they’ve actually been bribed to, a long time since.
I suggest Phillip Hammond is frogmarched out of number 11 the moment Boris Johnson becomes PM - IF he becomes PM of course. The Tories don’t WANT “A British Trump” running the show, taking the party back to the Right, and getting re-elected in a coalition with Brexit Party. They’d rather crash out of government, and be in opposition for a while, condeming the rest of us to tax hikes for everyone earning above minimum wages - which means US trucker folk for starters!