on UK tv adverts--there has been a huge increase in the number of "black" persons featured recently
Yup, in the U.S. as well. But it's so clearly fake, forced and not organic at all. They are simply doing it out of fear that someone will say that they didn't have any black people on their commercials. That's all.
And btw, why is it that blacks are the only race to somehow get you a get-out-of-jail card to prevent racial accusations? Why can't an Asian person, or a native american be enough to show support for diversity?