Thanks for the information and the time.
I am sorry but I cannot give you good news then. I’m afraid you are in difficulty here.
As a matter of principle, making a false report is perverting the course of justice. Giving false evidence on material facts is perjury.
However, you cannot just report that. Prosecutions against public justice are matters for the authorities. They will not act upon your report alone.
To be fair, they don’t bring these prosecutions nearly often enough. Sometimes they give them wasting police time fines but not often enough.
You can ask the police to consider a prosecution and judically review any decision to refuse but that is expensive.
Alternatively you can consider a private prosecution but again that is expensive and you have the burden of proof.
I'm sorry this isn't the answer you wanted but it is the position that you face and I have a duty to inform you truthfully.
Hope this helps. Please let me know if you need more information.