How a British victory in 1776 could change slavery and patrols

If Britain won the American Revolutionary War, how might that change slavery and later anti-slavery patrols?

Slavery would not end in 1776, but later British abolition could reach North America more directly and free naval effort for other slave-trade routes.

A British victory in 1776 would not immediately abolish slavery. North America might continue as a colony or gain self-government inside the empire. Once Britain later made slavery illegal, however, imperial authority could bring that decision into the colonies more directly than in the historical independent United States. The changed Atlantic position could also let the Royal Navy shift more attention toward the East African slave trade. The counterfactual therefore changes the timing and geography of enforcement while preserving uncertainty about the political path between 1776 and abolition.