Some context. The possibility of a negative reaction was anticipated. It was made known that the adoption of the regnal number II was intended to establish a new precident. Specifically that all UK sovereigns would adopt the highest previous regnal number for a Scottish or English monarch plus 1.

There was a King James II and VII who was King of England and Ireland as James II and King of Scotland as James VII.

Under the new precident, the next King James will be James VIII of the UK, and there will never be a James the III of England, just as there will never be an Elizabeth I of Scotland.