A High Court judge has reserved his decision in the judicial review of Act leader John Banks' committal to trial on a charge of filing a false election return. The court today heard arguments from Banks' lawyer, David Jones, that a District Court judge had made errors of fact in committing Banks to stand trial. But Solicitor-General Michael Heron QC, who has taken over the case from private prosecutor Graham McCready, said any factual errors were matters to be decided at trial, and not by judicial review.