bejam You don't understand the WTO and how its rules operate:
It doesn't spring into action as soon as a country or bloc breaks the rules:
it really only takes action if a WTO member, e.g. the US or India or China,
complains its goods are not being treated as favourably by say the EU as goods from the UK
imo we could probably get a special temporary waiver for NI,
because of the Troubles - almost every country would be sympathetic - and because it is a tiny, tiny % of the EU economy.
However, that doesn't apply to the rest of the UK / EU goods border.
If the EU just waived through all goods from the UK, the next day the US, India, China and many of the other WTO 164 members would be complaining.
The EU has to keep the same rules for the UK, or let everyone else in.
The WTO won't put up borders itself, but it can order the EU - if it waves through UK goods - to let in goods from all the other WTO members
That would destroy the EU's Single Market
The EU won't do that just to help us
Similarly, if the UK waves through goods mfrom the EU, it would have to wave through goods from everywhere else
Remember the hundreds of dead & seriously ill babies in China hit by contaminated formula ?
Red tape checks: All those goods with dodgy electrics, toys with lead paint or sharp little components ,,,,,,
The Brexiters' economist Prof Minford himself says the UK mass manufacturing and farming industries would be destroyed,
but that these should be replaced by service industry jobs
Even in the simplistic newspaper article you keep posting:
"it is up to London and Brussels to protect their own markets in no deal Brexit scenario"^
"The Geneva-based trade body where countries negotiate the rules of international trade would only intervene in a dispute over trade if one of its 164 member countries made a complaint.
One expert warned that it would fall either to the UK or EU - not the WTO -
to set up border checks in order to protect the integrity of their internal markets from illegal activity and divergent trade rules."