PMA yesterday ignored a threat from Xstrata that it would take legal action against the company if it continued to make public statements about its litigation against Xstrata over the closure of Windimurra. PMA, which holds a 15 per cent net profit interest in the mine, held a media briefing on the subject in Melbourne. PMA's chairman and 27 per cent shareholder, Guy Warwick, acknowledged that PMA was using the WMC bid to publicise the group's claim against Xstrata.