“They can’t tell if he was a genuine Black cab driver? Wow, this PC thing is getting Nutz.”
Don’t want none of them faky black cab drivers... only the real thing for them Londoners.
In London, the men who drive the black cabs are extremely knowledgeable about London’s complex maze of streets. They take a rigorous examination on the street geography. Most of them are so good they could find any street in Greater London long before the advent of GPSs. But of course there are frauds who also drive black cabs and don’t take an exam, aren’t licensed, and aren’t knowledgeable.
So when someone is referred to as a black cab driver, it doesn’t refer to his race.