Anonymity for the accused is a difficult one.

If you look at the Stuart Hall case it was because a number of women, unconnected to each other, that came forward telling remarkably similar tales of their experience that he was "persuaded" to plead guilty. 

If his identity had not been revealed when first arrested it is possible that many of these women would have continued to remain silent and the truth would not have come out.

Looking at it from the other angle I would ask the question as to why the name of the victim is kept secret in such cases - after all we don't live in a third world country where women who are raped or assaulted have anything to be "ashamed" of.