Less reggae and more hardcore. So many punk bands had Youth in their names it was almost a nervous tic. Reagan Youth, Wasted Youth etc. And Thurston Moore was big into hardcore.

Presumably BBC logic went something like this: 92% of the British population is white. That figure is even higher for viewers of Dr Who. It's hard enough already for those viewers to empathize with a two-hearted time-travelling alien. Let's make the actor playing him the same race and nationality as the viewers.