This garbage is nothing less than brainwashing for children, based on Joseph Goebbels idea that if you tell a big enough lie and repeat it often enough it becomes the truth.
Sub Saharan Africans played no part in the history or culture of Britain until very recent times, they did not occupy these islands, build Stone Henge or in any way shape our culture.
This is misinformation on a grand scale aimed at impressionable minds and it’s a disgrace it was ever published.