I don't think any TV station would have him on any of their shows that had comedians on. He's way more offensive than anyone you see on TV. His 'jokes' are way too brutal to be accepted by any channel. He wouldn't stand a chance in getting a slot with the BBC.
I would say Frankie Boyle is more offensive. Like this one of his, about Michael Jackson & what he'd do to kids:
"I'm gonna dress up as a surgeon, I'm gonna do operations on em. Put little cocks & little clitoris's into the palm of their hands, so when I'm holding hands with the, I'm actually abusing the little motherf**kers." Frankie Boyle
And his disabled jokes are more nasty than CB.