Skin color is contested, the idea he had black skin is in no way settled (the earlier models didnt have it after all)
 
it's a pre-human hominid who created the group we call Britons. His superficial characteristics dont change that since the group he led to still has a claim to their land, and certainly shouldnt have it abridged further than it has been. If you arbitrarily go back to the time when britons were dark to say his descendants have no right to their own part of the world, it doesnt justify letting in scores of people who also dont resemble cheddar man as if they have an equal claim as they have nothing much in common with Cheddar Man and less with no line of descent (and a weaker claim to the land if we want to discount ancestry altogether to say no one has such a claim)
 
Cheddar man isnt of the world, he was a hunter gatherer in this region who sired the British people. Possessing some characteristics like people of the world when the traits we associate with Europeans largely didnt exist is dumb
 
it doesnt matter if he did since he still wasnt comparable to any existing immigrant on any level besides skin tone, and his descendants developed lighter skin and became the group we call British who settled and founded this nation whose history far exceeds cheddar man. At some point distant ancestors were going to have dark skin, seems like a silly basis for immigration law.
 
I probably wouldnt want people like Cheddar Man moving in if they were still around tbqh. Prehistory Hominids dont sound appealing, and it would take 9k years for them to assimilate
 
https://archive.is/s4bGq
https://shysociety.co.uk/2018/02/24/cheddar-man-highlights-growing-obsession-skin-colour/
https://www.newscientist.com/article/2161867-ancient-dark-skinned-briton-cheddar-man-find-may-not-be-true/?utm_campaign=Echobox&utm_medium=SOC&utm_source=Twitter#link_time=1519306987