Club Rights

No, of course an independent Scotland would not be in the EU. Just as of course an independent Scotland would not be in a currency union with England, Wales and Northern Ireland. Both were silly questions. 

Nor would border posts, complete with armed guards on them, be purely a matter of whether Scotland would chose to erect such. The great and good of British defence are privately adamant that those posts would be indispensable in the event of Scotland's decision to become an alternative way onto this Island.

Whether the terms of Scottish independence in relation to the remaining United Kingdom, or those of any "devo-max" in the practically certain event of No vote, need to subjected to the requirement that they be approved by the majority of those members of the House of Commons who were sitting for each of England, Wales and Northern Ireland.

Such is the spirit of the age, that there would probably also have to be a referendum in each of them, although all three would have to be held on the same day, which would be the same day as the referendum in Scotland in the case of yet further devolution.

And majority approval, at both parliamentary and popular levels, in, by and from each of the nine English regions? That would by definition be majority approval in, by and from England as a whole. No one, therefore, could object to that.

However, since the Constitution is a reserved matter, this would not involve the Cardiff or the Stormont Assembly, as such.