In London, everyone is talking about the new Peninsula hotel, perched prominently at Hyde Park Corner, but not for the reasons one might expect. Sure, the entire city spent six years watching it being built from the ground up. And, yes, there’s a top-rated restaurant (the two-Michelin-starred Brooklands by Claude Bosi), cosseting guest rooms, and a sumptuous wellness center with more wood paneling than a small forest.

The real buzz concerns the clothes—specifically, the uniforms worn by its maître d’s, receptionists, and housekeepers. They were masterminded by Jenny Packham, known in these parts for outfitting the most stylish women in Sloane Square and revered around the world for the many evening gowns she has created for the Princess of Wales.