Northern Ireland's First Minister has resigned in protest of the continuing application of the Northern Ireland protocol, and quite pointedly in protest of the UK Government's failure to resolve the issue. It now emerges that Boris Johnson himself has conceded to the (former) FM that there is a slim chance of being able to renegotiate the NI protocol any time soon, and thus the FM responded by asking that Johnson followed through with his previous promise to unilaterally suspend the NI protocol under Article 16. Johnson has, of course, failed to reassure the FM that this is going to happen (as doing so would start a trade war with the EU), and so the FM has been left with little choice but to quit.
IMO, Brexit and the NI protocol in particular is the single biggest and most significant real-world manifestation of both Boris Johnson's incompetence and dishonesty.
Johnson repeatedly gave both UK voters and the people of NI assurances that there would "be no checks on goods" between GB and NI, but that is exactly what the NI protocol that he signed delivers and enshrines in international law.
The EU have made some concessions, recently claiming that some 80% of checks on goods can be removed in return for guarantees that unchecked goods do not enter Ireland, but in reality that is unlikely to happen - not because it is impossible, but because the UK Government have done virtually nothing to make it possible.
Bearing in mind that the NI protocol isn't even fully in effect yet, and you can get some idea of just how bad the issue is.
Frankly, I don't see how Boris Johnson could ever have hoped that this giant problem he and his followers have created was somehow just going to disappear.
The real problem for Johnson is that the UK needs to trade with the EU, but the EU can take the hit if EU-UK trade collapses (well, further than it already has) while the UK cannot. As such, Johnson has no leverage (and frankly never did) and hence he is left in an untenable situation - either the NI protocol remains (and UK-EU trade rumbles along uncomfortably) or the NI protocol is scrapped and triggers a full scale trade war between the UK and the EU which will damage both parties, but the UK will take a terrible hit.*
The full-blooded Brexiteers who promised that trade with the rest of the world would more than compensate for any lost trade with the EU have no answers - and, once again, they never really did. It was all smoke and mirrors, and now the chickens are about to come home to roost.
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* There are other options, but they will never be countenanced by Johnson or the Tories for one reason or another. Effectively, the UK would have to rejoin the Single Market - the dreaded 'Soft Brexit'. Not even Remain voters really wanted that either, but IMO it is likely to become an economic necessity, if not also a political one for the future of peace and stability in Northern Ireland.
When that penny drops, there's going to be ALOT of very unhappy Brexit voters - even more than there already is.
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Oh, and there's yet another complication - the more Johnson and the EU are able to accommodate NI as a joint EU Single Market/Uk Internal Market trading area, the more it becomes untenable to deny Scotland and Wales (or parts of England that may also wish to rejoin the Single Market) the same privilege.