Image: The wellness spa will be located in Belgravia

Designed by Studio RHE, facilities at the 11,500sq ft (1,400sq m) site will include a gym, run by personal trainer Matt Roberts; nine treatment rooms; a heat wet experience; hammam; herbal sauna; Vichy treatment room; dry flotation room; tepidarium and chill out areas.

All treatments will be unique to the club and exclusive product brands are being used, such as Kerstin Florian, Swiss Perfection and bespoke Ila products.

The team behind the enterprise has vast experience of the sector and includes operations director Anna Doyle, who has a background with Molton Brown, Elizabeth Arden, Thalgo and Occo.

Percival says it is more than just a spa: “Our vision was to create a place where women could come for all their health and wellbeing needs under one roof: a place where the best doctors, complementary practitioners and therapists work together to create a truly nurturing and caring experience.

Mosimann’s have created a delicious, healthy menu specialising in raw food, ceviche and seasonal hot dishes. Art and culture also plays a strong part in club life and members will enjoy lectures, seminars, workshops, fashion shows, art exhibitions and literary events.”

The team has already received approaches to develop the brand in Asia, the Middle East and some European cities, but for now the focus is firmly on getting the flagship London site up and running.