Did ya notice the anti-smoking ads on the ciggie boxes, they are all of white people ??
Never seen a black jockey...or on the tour the France....don't think they like riding tings 
Long story, but if ya do a birra googling you will find it.
Black jockeys were commonplace back in the 1950's and Sixties,
but when the wealthy owners/trainers daughters were producing half-cast babies, then the black jockeys were unpolietly asked to leave.......