In the notes about St Tristan de Cunha, “youngest English accent” does that mean the most recently split from England accents? Does that exclude Antarctic Engli

In the notes about St Tristan de Cunha, “youngest English accent” does that mean the most recently split from England accents? Does that exclude Antarctic English? Tristan's isolation is also the reason it has the world's youngest English accent, which is notably distinct from standard British English. https://en.wikipedia.org/wiki/South_Atlantic_English https://en.wikipedia.org/wiki/South_Atlantic_English https://en.wikipedia.org/wiki/Antarctic_English https://en.wikipedia.org/wiki/Antarctic_English