It's flat-out impossible, as far as I know? How do you figure it would happen?
Well before I hit a sudden mental block. I imagined a timeline where King triumphs over Parliament (dont ask me how exactly) and there are several butterflies. One is a failed American Revolution followed by several more due to harsher crackdowns colonially. Due to this distraction the French are able to reign supreme in India. Britain having lost any real chance of investing in the subcontinent instead turn to exploiting and colonising China.
Then there is a Great War where the British Isles are conquered and thousands of refugees flee to their prime colonies in East Asia where a creole like hybrid culture develops.
The only problems I have are in the British not fleeing to America instead (though I have some ideas) and how to get Spain to become a superpower (because I wanted to see a timeline with a powerful Britain and France but also a powerful Spain aswell).
This idea was sort of inspired by all those British go to
India stories I've read and I just got hit by the idea of an Englishman sitting on the Dragon Throne as opposed to the Raj.