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War veteran Ben Roberts-Smith won't be given a second chance to grill his former wife over claims she accessed confidential emails and passed them onto media organisations defending his high-profile defamation case.
Roberts-Smith lost his first attempt in January this year after a Federal Court judge found his allegations against Emma Roberts were based on nothing more than "bare possibilities and suspicions".
The Victoria Cross recipient had wanted to question Roberts over the alleged email transfer and add her close friend Danielle Cross to the lawsuit, claiming she was a co-conspirator in accessing the confidential material.
On Monday, Justice Michael Wigney declined to provide leave to the former soldier to appeal this decision.
Roberts-Smith claims Roberts used virtual private networks to access emails on computers owned by his company RS Group, through which he offered public speaking engagements.
He says she then passed them onto three media companies he is suing over February 2018 articles about alleged war crimes in Afghanistan.
Roberts has denied she obtained any material through covert means, and the three newspapers sued for defamation have said she did not provide them with any material for the ongoing lawsuit.