Richard Burton called it the most beautiful place in the world and, as she gazes out through the winter sun over the forests and peaks of Gstaad, in all its snow-globe loveliness, Alexandra de Pfyffer is quick to agree. It’s a “fairytale place”, says the aristocratic interior designer, who has turned her skilled hand to friends’ Alpine chalets, lakeside mansions, banks, boats and even a private jet. The discreet luxury of the magical Swiss resort, ringed by snowcapped mountains, has bewitched stars and royalty over the decades, with the likes of Sir Roger Moore, David Niven, Elizabeth Taylor, Brigitte Bardot, Princess Grace of Monaco and Madonna all enjoying the pristine slopes and glittering but unpretentious après-ski gatherings. Alexandra’s own chalet ticks all the boxes for relaxed yet refined entertaining.…