Paul Goggins (Parliamentary Under-Secretary, Home Office) replied

Defendants charged for making false allegations are likely to be proceeded against for "perverting the course of justice". It is not possible from the information held on the Home Office Court Proceedings database to identify from the number of defendants proceeded against for "perverting the course of justice", what number were for false allegations of abuse, as the circumstances of the offence are not collected centrally.

Hansard Reference
Acknowledgement