No Mark, It was always made clear that the referendum on brexit was a UK wide vote. I'm sure I don't need to remind you that UK consists of Great Britain and Northern Ireland and that the majority vote was for Brexit.
The fact that we are leaving the EU as one country when, in fact, we are 4 United Countries can appear strange I grant you. But a challenge does not stand up to scrutiny. It was made clear beforehand that the referendum was a UK wide referendum and the decision would affect the entire UK.
Rather perversely, you actually strengthen the Brexit argument for England and Wales by tacitly suggesting that if we discount the N Ireland (and Scottish?) vote then the referendum result would maybe have been as convincing as 70/30? But what then? Rebuild Hadrian's wall, strip those in N Ireland and Scotland of UK citizenship, cancel all the subsidies paid to N Ireland and Scotland from London, dismiss all N Irish and Scottish MP's from Westminster? A hard border between England and Scotland?
No Mark, We are a United Kingdom and for as long as the people of England, Scotland, Wales and N Ireland wish that state of affairs to continue, we will go forward together.