Graham Norton: TV Times

"There are things we can't say and do on TV or radio that 10 years ago we absolutely could have said or shown.
"I think that's the BBC reading the mood of the audience - the audience don't particularly like cruel jokes, and I think they did."
[Asked whether it was an accurate or paranoid reflection of the audience]: "Probably a bit of both. We'd show a picture that might have had a penis in it, and we can't show that now. The audience really laughed at it, and that's sort of stopped."
"If you think back to some of the shows we watched growing up like I Claudius - that would never be shown now. I wonder would Queer As Folk happen now?... And the big drama hits now are so goody goody. Like you would never see a nipple on Downton Abbey.
"When we were growing up, you'd have thought that by now in EastEnders there could be nudity, but that's not the case."

Radio Times.
As regards the BBC, much of the problem is they keep caving into silly Daily Mail witch hunts and manufactured moral panics, lest the Tories slash their budget further, or privatise them.