The two-story country house, modest compared with the other chateau of the area, sits proudly underneath a perfect wide blue sky, surrounded by neatly trimmed vines festooned with lush red roses which would be any horticulturalists dream. I am in Bordeaux, the spiritual home not just of French but world wine making. Opposite me, examining a vine with dexterity and not a small degree of tenderness, is Oliver Berrouet, 32, the chief winemaker of Petrus, perhaps the finest wine producer in the world.