You're still missing the point. The biggest decision of Brexit was to ignore Scotland and Northern Ireland.
That was a political choice, but who made it? Can you remember?

The law said nothing about any referendum result. The law never said anything was to follow from the referendum, so it never defined a majority. Why would it? There was nothing to define it FOR

So if the law never said anything about the result, who decided that Scotland didn't count?
It was the BBC. It's peculiar, but it was actually the BBC who decided to leave the European Union

If you remember immediately after the referendum there was nobody taking responsibility.
Cameron was hiding, Johnson was hiding, but there was nobody taking responsibility for it

So if the law never said anything about the result, and the prime minister was hiding under his bed, who did interpret the result?
Who made the first interpretation that then became established as fact in the public mind?
It was the BBC

What the BBC could have done, with equal legitimacy, was to say that the country was divided, and Scotland has voted to remain.

That, of course, would have provoked a huge debate about whether or not Westminster should use an English majority to disregard a clear majority in Scotland.

And that in turn would have set off a massive debate about devolution, independence, the future of the union.

If the BBC had chosen to acknowledge the result in Scotland, the public conversation that followed would have been about the nature of the union rather than giving Article 50 notice

It's not really the BBC's fault. David Cameron was vanished into thin air. Somebody had to say something. They were left with a job that should never have been theirs.

The government had abdicated, the law said nothing at all. You've got to tell people something.

You either say the country is split, England and Wales voting leave, Scotland and Northern Ireland remain.

Or you just say, Britain

Either one of those things would have been a political decision.

Britain has voted blah blah blah

England and Wales have voted blah blah blah

The BBC had to say something. The government was absent, the law said nothing. So they chose to say "Britain has voted to leave . . ."
And that established the presumption that Scotland didn't count. And that's how the BBC decided to leave the European Union.