The BBC's attitude to sexual abuse during the 1990s

Per Paul Merton's autobiography as reported in The Telegraph:

"I heard about him (Dave Lee Travis) 20 years ago. A technician somewhere told me that there was a rule at the BBC: Don't leave him alone with a woman."

If the BBC knew about Dave Lee Travis's pecadillos but did nothing to stop him, let alone report him to the police, then are they not also guilty of an offence?