Allied Domecq and Lion Nathan have been steadily increasing their respective stakes in Montana, the premier New Zealand winemaker at the centre of a bidding war between the rival drinks giants. Having purchased a 51% controlling stake in Montana in February, Lion has been increasing its stockholding this week after Allied snapped up 7.2m shares in the winemaker, taking its own tally to 10%. An Allied spokeswoman said everything was still to play for in the battle to gain control of Montana, although Allied had stopped buying for the time being. In mid June the New Zealand Stock Exchange will decide whether Lion Nathan's original purchase of Montana stock breached its rules. The spokeswoman confirmed Allied would move in for the kill if Lion is found to have acted improperly and forced to sell. {{NEWS }}