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What we learnt walking the route of London’s ancient city wall. Read more at telegraph.co.uk/ tt-londinium collaboration between the hotel and Simba, a London-based “sleep technology company” and mattress manufacturer.

With soft, pink walls and dim lighting, the rooms are more like pods, but offer furniture crafted in the style of a human’s internal anatomy, with rounded edges and springy surfaces creating a comfortable environment.

“No stone has been left unturned in trying to create a soothing effect in the design architecture of our new cutting-edge sleep retreat,” Hope Bastine, a sleep psychologist at Simba, said.