You haven't said what the question would be?
You haven't said if it would be 'advisory'.
You haven't said if there would be a turnout threshold.
You haven't said how big the wining majority will need to be.
You haven't said if a 3rd referendum might be needed.
You haven't explained what the trade deal with the EU will be.
So basically you want a blind vote on an unknown proposition. So anther vote on worse terms than before. What a flocking nightmare. WHY?