Montana Group today announced that it has asked Gordon Cairns, CEO of the beer company Lion Nathan to become a director of the New Zealand-based wine company.Lion Nathan has close to a 21% stake in Montana and last month said it would pay up to NZ$2.65 a share to take its total stake in Montana to 25%.The wine company also announced the following changes to its board: John Wigglesworth and John Burrowes have retired. Hylton Le Grice has been appointed a director.Chris Brook-Carter