Actually, I agree with putting the Bee Gees in the top 10. Note their longevity, first of all. They created some incredible music in their time, but I don't know about having them in the top 5.

As for Floyd's influence, yeah, it definitely wasn't as big as that of The Beatles or Zeppelin, but they belong in the top 10 as well.

UB40? Never heard of them. British pop?