Adopt basic principles of economics, supply-and-demand etc., as the foundation for the future economy, rather than the special-interest protectionism and nativism and pseudo-patriotism and demagoguery of the past.
Britain has an opportunity now to set a new course and serve as a role model for other nations.
"international law"? I'll assume this means the EU is requiring some trade constraints by Britain. If that's correct, then this is the cause of the problem, and Johnson's proper response is to defy this and tell the EU to f**k itself and get its ass out of the way, because free trade works and there's no need for anyone to impose any trade CONSTRAINT onto anyone else. Whoever is demanding any trade barrier to be imposed onto anyone is the cause of the problem -- it's that simple. Get rid of those barriers, whoever or whatever is causing them, and the problem is fixed.
What is the practical need for the inspection facilities to interfere with UK-NI trade? If no one can explain the need for them, then why should this trade obstructionism be enforced?
But the EU are rapidly running out of patience with this failure to comply with legal obligations under the Withdrawal Agreement.
Why aren't we "running out of patience" with idiots who keep insisting on the need to interfere with free trade across borders? Why doesn't the EU tell these idiots to shut up, or demand an explanation why trade across borders has to be obstructed? Why does everyone just assume, blindly, that we must accept these artificial barriers to trade, which hurt all consumers and cause a lower living standard to all (except maybe to a few uncompetitive crybabies who need to be protected against foreign competition)?
Instead of "dragging his feet" he should just tell the EU to "F**k off!" and let the free market work.
Johnson and his government have used every pathetic excuse you can imagine for this.
What they should do instead is tell the truth: the only ones who need "inspection facilities" to obstruct trade are special interest crybabies and parasites who inflict damage onto everyone in order to promote their selfish gain, or their narrow xenophobic pseudo-patriotic prejudice.
They said that they hadn't read the treaty before signing it, so it shouldn't be enforced.
It also should not be enforced because it was wrong in the first place, as artificial trade barriers are always wrong, and should be defied and repudiated, no matter what mistake produced them and caused someone to falsely agree to them. In the long term there will not be any harm to Britain's economy by refusing to obey misguided trade protectionist barriers imposed by idiots who want to obstruct trade between countries.
They said that asking them to do what they committed in writing to doing was unreasonable, unfair, and vindictive. They said that the EU should be 'pragmatic' and allow them to ignore inconvenient parts of the treaty that they signed. And they have repeatedly extended the deadline for full customs controls on EU to UK trade, in an attempt to justify their ongoing failure to manage UK - Northern Ireland trade.
They should do whatever it takes to continue avoiding any form of artificial trade barriers. It would probably be best to bluntly proclaim the benefits of free trade and repudiate all forms of artificial trade barriers and dare the EU to try to defend trade barriers with economic arguments, which it cannot do. There is no reasonable basis for imposing trade barriers of any kind.
There's only one lawful recourse, which is a hard customs border in the Irish Sea.
Another "lawful" recourse would be to enact a Free Trade Law condemning and repudiating all artificial trade barriers of any kind, even from the EU, and repudiating any past agreements to impose such barriers.
Johnson has to either break his promises to the Unionists, and risk renewed sectarian violence in Northern Ireland; Or illegally break the terms of the Belfast Agreement and risk both sanctions from the EU and US, and renewed sectarian violence in Northern Ireland; Or illegally break the terms of the Withdrawal Agreement and risk sanctions from the EU and/or the complete collapse of the Withdrawal Agreement and the end of all protection against the worst case outcomes of Brexit.
The latter is the only practical and reasonable course. The EU must be made to retreat and admit that it is wrong to try to impose artificial trade barriers. On anyone anywhere.
Of course, a hard border in the Irish Sea would make Irish reunification far more likely. Which is why the DUP are so deadset against it.
There should be no "hard border" anywhere which imposes artificial trade barriers onto buyers and sellers. If a "hard border" is necessary, let it be one which allows free commerce to flow across. If someone insists on putting the trade barriers there, Britain should disassociate from it and refuse to enforce any such barriers. Total obstinate refusal to enforce any trade barriers, no matter what, cannot hurt Britain's economy in the long term.
solution to all the above:
Eliminate all protective trade barriers, no matter what is the excuse for it. Those who demand any trade barriers are the cause of the problem.
If it means violating something the EU wants, then tell the EU to shove it. The EU has no business requiring anyone to impose a trade barrier onto anyone else. Trading blocs, or trade unions, came into existence originally in order to REDUCE trade barriers, not increase them. It is perverse of any trading bloc to impose trade barriers or to INCREASE the barriers. Any legitimate trade union has no need to do anything other than LIMIT the tariff levels, or put maximum tariff levels, never to put minimum tariff levels on trade or require a tariff or a higher tariff level. No one can give any reason for any such requirement.
It is only certain crybaby labor unions or crybaby business interests who demand protection against foreign competitors. The solution to all of Britain's new trade problems, related to BREXIT, is to eliminate or reduce the tariffs, regardless of any demands from the crybaby protectionist interests and from demagogues in power who are pandering to those special interests.
Britain needs to adopt unilateral free trade, in order to make BREXIT work, meaning it must eliminate all the protective trade barriers/tariffs, and then if the EU sinks to the level of trying to impose trade barriers and enforce them, Britain must
defy the EU and defend the principles of free trade (supply-and-demand, profit motive, competition, etc.), which do work if the demagogues and special interest uncompetitive crybabies and Snake Oil Economists just get their butt out of the way and allow the capitalists to serve consumers (and yes, even make more profits if they're more competitive -- How dare they get rich serving consumers and making us all better off --- the dirty capitalist pigs!).
Unilateral free trade would work for Britain (or any other country which would choose that course rather than be bullied by the Fair-Trade thugs), and open their market to all countries and all industries and all global competition.
(As a practical course, it would be appropriate also to have a very low uniform tariff level across-the-board on all imports, no matter what, as a simple revenue-raising tax not aimed at reducing competition. But to facilitate trade rather than slow it down, there should be a different formula for the tax, which would be to base it on the weight and volume of the cargo rather than on the value. A tax on the "value" of the import is subjective and requires artificial and arbitrary calculations which effectively serve as trade barriers by increasing the log-jams at the ports.)
What Britain should do initially is eliminate ALL tariffs unilaterally, reducing them all to zero, regardless what the EU or anyone else demands; but eventually work on a new system of having a low tariff level, uniformly applied to ALL imports of any kind, regardless what is the origin of the imports or the category, coming up with a quick simple formula for assessing a uniform low tariff rate on everything, not based on protectionism but only on a simple revenue-raising need, so that trade serves all consumers and all the citizens, rather than being manipulated by demagogues to serve special interests at the expense of everyone else.