You realise that exemptions for clergy/penitent privilege don't come free with a box of cheerios right? That what counts and what doesn't is written in the legislation? That some states even in the US don't even recognise it?: Others recognise it only in some circumstances? That it doesn't even exist in some jurisdictions as a concept?
As for the second part to your increasingly bizarre post. The idea is that the priest would not be able to grant absolution until they did know it had been done. If only there were a communication device the priest could use and hand to the abuser...
UK law has few professions legally required to report. Priests aren't currently among them. But the priest is also free to report himself/herself in the case you describe.
Odd few posts Fisherman. Sorry but I've more interesting things to do now. Take care. Remember to read carefully! Not sure anything can help the understanding deficit you're displaying though :)