Comment by Mordisquitos

> the people of the Isle of Man were EU citizens.

Not quite, at least not by default. The pre-Brexit Manx passport did confusingly include the text "European Union" on its cover, but holders of Manx nationality were only citizens of the EU if they had lived for at least 5 consecutive years in the UK or if they descended from a UK parent or grandparent.

Source: https://en.wikipedia.org/wiki/Isle_of_Man-variant_British_pa...