^^^ I don't think it's anything to do with relationships with the rest of the world. It's simply decriminalising something that shouldn't have been criminalised in the first place. Who's harmed if the greengrocer sells a pound of potatoes, rather than a pack of 453 grams? Is the world going to come to an end if the farmer sells a dozen eggs, rather than a metric 10?

^^^ Ignore the bullshit that Boris the Buffoon spouts incessantly. It's not connected to any sort of intellectual process. The short version is that something that was made illegal because of the EU is now legal again. Of course British companies will largely continue dealing with overseas parties using the metric system (except when dealing with the US of A, Burma and Liberia).

Similarly, the British are now allowed to consider the humble carrot a vegetable again, not a fruit as the EU determined simply to allow the Portuguese to continue making their traditional carrot jam.

No, it's going to be terrible. It'll be a terrible culture shock. I remember how I was shocked when first I visited France and discovered not only did they not speak English (God's own language, as you know, because the Bible was written in it), they also didn't use pounds sterling, or how they didn't use deodorant and their women let their underarm hair grow into an unseemly, rancid-smelling thatch, to be aired whilst riding the "Métro". They also appeared unaware that eating vast quantities of garlic led to foul breath, and they didn't even bother to use mouthwash. They also seemed to think that cricket balls should be thrown underarm, and they called the game "pétanque". They couldn't even spell properly, with renegade squiggles appearing above their vowels, Métro & pétanque being prime examples.

When I got caught selling an eighth of charlie to an undercover copper I got an extra three months on my sentence for not selling metric.

Can I sue the courts retrospectively?

Oh you're still here then and still talking shite. Your mate is concerned about you, please contact him ASAP. Ange also.

If you're exporting and importing articles which need to fit a common system is needed for dimension, weight, tolerance, etc.

When products are assembled for locally produced part one may use their own 'from the good old days' system. As Global Britain you need to adhere to the International System of Units. See also en.wikipedia.org/wiki/International_System_of_Units

BTW did you know that NASA does most in the metric system and requires supplies to do the same?

Teaches you to read the small print.