Housed in a 19th-century building on Holbein Place, this Victorian mansion now exudes French sensibilities along with an eternal British charm. Hotelier Costes and designer François-Joseph Graf have created a discreet home-from-home with just 30 period bedrooms and suites, ranging from a “Mini” to a two-bedroom apartment. Enter via the Neo-Greek lobby and descend to the lower-ground floor speakeasy bar. Or climb to the top, where you can dine in the candlelit restaurant, surrounded by stained-glass windows, a mosaic floor and an antique collection of Anglo-Chinese vases. Vintage albums and a signature scene throughout create an immersive feel at One Sloane.