Spa Ethos: The former country estate of the third Duke of Marlborough, The Langley is one of Buckinghamshire’s best-kept secrets following a million-pound renovation. Forbidden to build up, an impressive subterranean spa was created, complete with 16m marble-lined swimming pool, hammams, vitality, pools, Himalayan salt-walled sauna and an amethyst steam room. If you’re feeling active, book in for a session with PT Matt Roberts, who heads up the cutting-edge fitness suite, offering bespoke wellness programmes. 

What To Book: With treatments from Sisley, La Sultane de Saba and Margaret Dabbs on offer, you’re spoilt for choice. The Sisley Supreme Facial will leave skin restored, while signature Spa Journeys are blissful, two-hour treatments inspired by native wellness traditions. 

How To Get There: Central London is a 40-minute drive, or direct trains from London Paddington to Slough take 13 minutes, with a ten-minute taxi to the estate. 

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