Thinking logically here.
17 year old, into drugs, somehow attracts the attention of an older well-known male. Engages in illicit activity, explicit photographs for which the wealthy man is willing to pay. The teen takes the money, either for continued activity or because he is blackmailing the celeb.
Mum finds out. Mum is naturally upset and her child naturally blames the celebrity for the sexual advances and the drug taking. Mum complains to the BBC who don’t do anything with it. Mum goes to the Sun.
In the meantime, the now 20 year old is being advised by a lawyer. He may have already signed an NDA, he may have been advised that taking money could be construed as blackmail. He may just want the whole story to go away so he can get on with his life.
It does sound similar to PSs situation where the young chap also denied the relationship. I think this story is true, it might not go any further and whoever the BBC presenter is will have blown up their life for a bit of titillation.
Perhaps the mum thinks the only way to get her child off drugs is to expose the presenter and therefore cut the funding off.
For the love of god though, just name him so we can move on!