Laurent Perrier is a family owned Champagne house, one of the best, dating from 1812. During World War II the owner, Marie-Louise Lanson de Nonancourt, built a false wall and hid 100,000 bottles behind it to protect them from marauding German soldiers. She showed great foresight - in 1945, her son Bernard, in the army, helped 'liberate' Hitler's home in the Bavarian Alps, where he discovered half a million bottles of wine. Among them were hundreds of cases of Champagne that he'd watched being st