Described as a mini Crystal Palace, the 19th-century, glass-vaulted Paul Hamlyn Hall is easily the grandest afternoon tea setting in London. The tea itself is as lavish as its surroundings: exquisite pastries are crafted using seasonal British ingredients by master pastry chef Claire Clark MBE, and its selection of floral teas are inspired by beauty brand L’Occitane’s La Collection de Grasse. Ruinart champagne, live piano music, and a complimentary L’Occitane fragrance are added treats.  Bow…