In short:

Former NSW premier Gladys Berejiklian has failed to overturn the finding that she engaged in serious corrupt conduct.

Last year, the Independent Commission Against Corruption found Ms Berejiklian breached public trust, while serving as state premier, during her secret relationship with former NSW MP Daryl Maguire.

Ms Berejiklian has long insisted she always acted in the public interest, beginning legal action shortly after the corruption watchdog released its report.