For goodness sake ! Michael La Vell is a very prominent actor, in one the most watched TV programs on TV today. According to his accuser, she was abused by him on a number of occasions. I think she would have known who it was that was raping her.
I repeat, the Jury decided that she wasn't telling the truth and there was no other corroborating evidence against La Vell, like forensic for instance
The case with the boy that was raped at the care home in North Wales all those years ago is completely different. The reason that the boy, now a man, identified his abuser on Newsnight as a certain Lord X, was that the Police showed him a photo of the person that abused him. The Police identified the abuser wrongly, and until very recently the chap had never given what the Police told him another thought. His real abuser was almost certainly a relative of Lord X, who lived nearby, with the same surname.