All wrong.
I don't care how long ago it was, if there is evidence of a crime then the police must investigate. Following on from that, if there is sufficient evidence to charge someone then they must be charged. FULL STOP.
It's down to the court if someone is guilty or innocent - not the police, not the CPS and certainly not the press or individual members of the public who haven't got the first idea about what evidence is or isn't available in each specific case.
There is none of this stupid 'statute of limitations' in the UK - a crime is a crime.
Stuart Hall has just admitted his crimes, should he now be let off scott free because it all happened a while ago. And he hasn't just had his wrist slapped, he will be sentenced on 17th June - Stick the perv inside for 20 years.
I'm afraid I will have to disagree with some of you on this. You may have noticed.