In the case of a British Revolution in the 1830s, what would happen to the colonies? Here are my thoughts on some colonies.
India would go British, as the East India Company feared a “native” revolt and would likely give them to Britain to avert this possibility. It was also more loyal to money than any ruler, so allying with the king in exile in Hanover makes no real sense in that regard. Seeing rather blatant divisions within the ruling class would result in rebellions throughout India.
The Canadas would see some recalcitrance from the Governor-General and the local populations, but I think it would go British since the republic would pledge further reforms in terms of responsible government. In Upper Canada, you’d see riots, but riots aren’t really anything new in this colony. In Lower Canada, the population would be a little angry about being ruled by republicans, but so long as they aren’t interfered with, they would be mostly ambivalent to the republic. The Patriotes would be pretty happy to see large reforms passed, but they were never anything more than a minority.
Nova Scotia is a little more interesting. Unlike Upper Canada, it didn’t see large amounts of immigration by non-Loyalist Americans post-ARW, so this firm loyalist sentiment means it may try to retain its loyalties to the king in Hanover. If any royalist mutinies occur, some ships may dock in Halifax, giving it some form of defence against the republic. You may see a war between Nova Scotia and the republic.