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Then what do you call the descendants of Britain Slavery? Cause I'm sure those folks been there a little bit too long to be 1st gen and 2 gen Africans or Caribbean Africans....
not sure there is a name for them.
but you mean groups like ..
"Liverpool-born Blacks are people of Black African ancestry born in the city of Liverpool. Liverpool has the United Kingdom's oldest and longest established black community, going back several generations.[1] Liverpool's black community is also unusual among those in the United Kingdom, as the Liverpool-born Black British community often constitute a category distinct from later African and Afro-Caribbean migrants.[2]"
"Dating to the 1730s, the Black community of Liverpool is Britain's oldest, with some Liverpudlians being able to trace their black heritage for as many as ten generations."
Black people in Liverpool - Wikipedia
en.wikipedia.org