I'm not clear about what you are trying to say, K.
But a politician, even the PM, promising something in the media doesn't often carry
much legal weight, especially in constitutional matters.
I doubt that any public promises made before, during or after the referendum would
have even been considered by the judges. (Happy to be corrected, of course!)
I just mean that the legal issue is distinct from what the voters were told would happen if they chose "leave" (Cam triggering brexit/article 50 the next day). So it is a legal issue, but not one which casts itself less legitimacy on the referendum's meaning. I mean no one said "if you vote leave then mps will vote if they agree with you, lol" ^^