I'm pretty sure she was granted lifetime immunity as part of the process.
Not for the first time on this site you make a confident assertion that is utter nonsense
Complainants do not need and do not get "lifetime immunity" - something which does not exist anyway
No-one in this country can be convicted for any offence unless a jury is
sure that they are guilty. May be guilty, might be guilty, possibly guilty or even probably guilty are not enough. If therefore a complainant in a case that resulted in acquittal was prosecuted for perjury and if their jury thought that there was a possibility that they might be telling the truth then they too would be acquitted. Unless new evidence had come to light to
prove that they were lying that would almost always be the case. Besides no-one would ever make a complaint if they thought that they themselves would be prosecuted if there was no conviction
Its the same principle that ensures that convicted defendants are not themselves subsequently prosecuted for perjury if they lose their trial
People really should avoid passing off ill-informed opinion as fact on this and any other thread