Okay. So half of britons can't name a black british historical figure? So what? That means HALF of britons CAN name a black british historical figure.
Personally I cannot name a single black british historical figure off the top of my head. But I also kind of find it offensive that people want to separate historical figures into "black" and "white" (and maybe others.. who knows?). Do we need to have a catagory for every type and mix? Like ffs.