It matters to British children of color to see their cultures represented in positive ways and as great contributors to the world they live in.

I might agree with this if I wasnt a British child of colour at one point in time. Anecdotally, I never cared about the colour of anyones skin. If you were a British historical figure then you were a British historical figure. As a kid I never cared to put people into different boxes based on race. I'm all for teaching kids about history from people of all walks of life, but I dont feel the need to say "this was a black british person" or "this was a white british person". They are British people.