@prettybird Alex Salmond tried to table an amendment to the EU Referendum Act to the effect that there needed to be a majority in each of the constituent nations of the EU for Leave to happen.
I think you meant to say "in each of the constituent nations of the UK for Leave to happen"
Not possible as the question on the ballot paper was:
Shall the UK remain in the EU.
That the UK is a micro union of 4 members makes no difference to the EU as it had an agreement with an entity called the United Kingdom.
Plus it could potentially create a situation whereby 395,075 Remain votes in NI (the UK member with the lowest population) would have cancelled 17,400,000 votes to Leave across the entire UK.
It was rejected as unrequired because the result of the referendum wasn't necessarily binding.
The leaflet sent to each UK household stated
This is your decision. The Government will impliment what you decide.
That made it binding beyond any reasonable doubt.