So what on earth were you talking about, keith, when you said, in reference to precisely that point, that "Yes, it is disputed"?

It is disputed that the referendum was only advisory.
It was sold by all the main parties as a binding decision.
The people would decide, not Parliament.
No-one disputed the legitimacy of that pledge until the result came in.

Whatever "pledge" might have been given by the government in advance of the referendum, that can have no legal force. Laws don't work like that.

Not being a constitutional lawyer, I can not argue that point.
You may be right, but I would remind you that until the appeal it is still in dispute.
Do you have inside information?
Do any of you?