Just steps away from the shopping meccas of Harvey Nichols and Harrods in Knightsbridge, the ancient healing powers of gold are put to use in the Umo 24 carat gold facial at 122 Knightsbridge. First, Gamma PGA (a super-hydrating compound), is massaged into the skin before a Nano Misting gets the skin ready for the application of the gilded goodness. Pure 24-carat gold sheets are placed all over the face and then - after another misting - massaged completely into the face. Skin is left glowing and the treatment has even been known to help calm skin conditions such as eczema. Could there be a more decadent or skin-savvy pre-wedding treatment? Available at 122 Knightsbridge, London. Call 020 7584 6777 to book.