Is there a city with more top-end hotels than London? From grandes dames like Claridge’s to newcomers like the Six Senses London, an abundance of choices awaits travelers in the category shorthanded as U.H.N.W. (that’s ). Among the newest and most acclaimed, both in historic buildings: Raffles at the OWO, which opened in 2023 in the Old War Office in Whitehall, and the Chancery Rosewood, which made its debut in 2025 in the former U.S. Embassy on Grosvenor Square in Mayfair. How do they stack up?