Decadent and spacious, these dreamy 24-26sq m rooms occupy the prized position at the front of the townhouses on the first and second floors. Most boast lofty ceilings, and all feature vast sash windows with shutters, drapes and views over Great Pulteney Street. Designer Martin Hulbert has added pale colours, stripped-back walls and modern see-through furniture, which nod toward the building's rich Georgian heritage. There's a super-king four-poster bed in some, and an inviting seating area embraces the space. In the ensuite bathroom, you'll find marble-topped washstands with bespoke hand basins, 100 Acres Apothecary bath products and a walk-in rainfall shower. Extras include a Hypnos Lansdowne cashmere mattress dressed in 200 thread-count Egyptian cottons, a Nespresso kit, access to the No.15 Pantry, a Dyson hairdryer, a smart TV and free Wifi. For music lovers, there's even a turntable – choose your records from No.15's disc library.