I'm sure there are even instances even more clear cut than this where someone was clearly in the wrong but blamed a traffic stop on racism. I'm sure this happened more than once. Isn't really informing me of anything useful. If you want to know if there's a systemic problem with traffic stops you look at the rate at which black people are being stopped relative to their share of the population.

I don't have traffic stop numbers, but this one is looking pretty bad: https://www.ethnicity-facts-figures....-search/latest
If this is accurate, you're almost 10x more likely to be stopped and searched in the UK if you're black. That is hard to explain away.