Michael Kelly (Perspective, 5 September) appears to believe that the separatists want to retain the Union of the Crowns.
This is a popular belief but not what “retaining the monarchy” would mean in practice. There is no going back to the anomalous situation of 1603.
The only way an independent Scotland could have the British monarch as head of state is via membership of the Commonwealth, specifically as a “Commonwealth realm” (there are at present 16 such “realms”, including the large dominions such as Canada, but also small states like Barbados).
An independent Scotland would have to apply to join the British Commonwealth.