Justice David Hammerschlag

Dexus has lost its case over the validity of a default notice issued by Melbourne Aiport's operator, with a judge saying the real estate asset manager breached the company's confidentiality and "irrevocably undermined" its relationship with fellow shareholders.

Heads may roll after a court on Friday rejected the evidence of key Dexus employees at trial over a breach of APAC's shareholder deed, in a ruling that revealed some insiders suspected the "embarassing blunder" would come back to bite.

Evidentiary disputes brewing in a $55 million defects case over the Port Botany Enfield Intermodal Logistics Centre will be closely managed by the court, which has heard that the costs could surpass the value of the claims. 

Making good on his threat to case manage the litigation with an "iron fist", a judge has set a trial date for early next year in four cases over the Port Botany Enfield Intermodal Logistics Centre.

A judge said Tuesday evidence in a case over the sale of a stake in Melbourne Airport's operator might justify a finding that shareholder Dexus acted unethically and immorally. But whether such a finding was relevant to the validity of a default notice at the centre of the suit is another matter.

APAC issued a default notice to Dexus' infrastructure fund manager for a purported breach of a shareholder agreement during a share sales process to "get rid of" it, a trial has heard.

Previewing Monday's closing arguments in its legal tussle with the operator of Melbourne Airport, co-owner Dexus says it won't deny a long-term model given to potential share purchasers was confidential. But here's the kicker -- the disclosure didn't run afoul of its shareholder agreement, it says.

T Corp's representative on the board of Melbourne Airport operator APAC said Thursday he voted to issue a notice of default to shareholder Dexus in part because the real estate asset manager "appeared to prefer its own interests".

Institutional asset manager IFM Investor was ready to sweep up Dexus' shares in Melbourne Airport operator APAC under a forced sale process triggered by a default notice for alleged confidentiality breaches, a court heard Tuesday.

The chair of airport operator APAC has admitted redacting advice from Herbert Smith Freehills Kramer to remove a suggested remedy for major shareholder Dexus' alleged breach of confidentiality, but denies she misled the board.