A different set of slaves
The Gray Monk has a fascinating history of a small slaving operation:
..the slaver raids on Cornwall and the North Devon coast in the 17th and early 18th Centuries. These were Barbary Pirates who were based mainly at Salé near Rabat in Morocco. At one point they had occupied Lundy Island and flew the flag of Islam there while they made free capturing ships and crews and raiding the coastal harbours and villages for women and children as slaves.
So that is Africans coming to Britain to enslave whites, how does that fit in with the PC history we are all taught now?