The London hotel with £10,000 mattresses that helped even an insomniac like me…

I’m an expert when it comes to sleeping – or should I say not sleeping.

I’ve been an insomniac for decades and have tried everything from hypnotherapy to acupuncture, including sleep retreats in hotels where I’m even hooked up to countless cables at night to test my sleep quality. All without result.

These days, I accept that sleep will always be a struggle, even with the eye mask and white noise machine I always take with me when I travel.

But my ears perked up when I heard that The Mandeville, in a quiet part of Marylebone, was the first hotel in London to fit a number of rooms with Dux mattresses from Duxiana, the Swedish company that is the official bed supplier to Tottenham Hotspur football club. Players sleep on beds costing £25,000, both in their homes and at the exclusive Spurs Lodge hotel where they stay before matches.

The Mandeville’s aren’t quite the same, at £10,000 for the mattress, but the Dux 31 still uses the same sleep technology, which, according to Geoff Scott, head of medicine and sports science at Spurs, is ‘more than just a mattress… the whole sleep system is an important part of it.’

Jane Knight (above) checked into The Mandeville in Marylebone. It is the first hotel in London to fit rooms with £10,000 Dux mattresses from Duxiana

A Dux bed in Duxiana’s flagship store in Marylebone, a short walk from The Mandeville

The gist of this is that a continuous open coil replaces the normal springs, meaning the mattress adapts to the shape of your body as you move around in sleep. Between the springs and a top layer are three separate pads (Duxiana calls them cassettes), which are available in soft, medium or firm options. These are adjusted to your weight, height and body type to align the spine, support your lower back and sink shoulders and hips.

Before you stay at the hotel, you fill out a questionnaire about your body shape and sleep patterns, and they adjust the cassettes to best fit you. Mine were medium in the head, soft in the middle and firm for the legs, which is what most women need (unfortunately taking stomach and butt into account, I thought). Men’s heavier shoulders mean they are softer, medium and firmer from head to toe.

The Duxiana store will reimburse customers up to £500 for their stay at The Mandeville (above) if they purchase a mattress

Rooms with a Duxiana mattress cost from £280 per night with continental breakfast

And so off to bed after a sumptuous three-course meal at the hotel’s Reform Social & Grill restaurant with just a single glass of red wine so that the alcohol didn’t affect my sleep quality. I had one of the Riviera rooms on the fifth floor, designed by Maison Christian Lacroix, and it certainly lived up to the Midnight Blue name, with bright and dark shades of blue and pink accents.

Jane revealed that the Dux mattress (above) doubled the amount of deep sleep she got

It was more dramatically exuberant than calming and soothing, but it did have two important prerequisites for a good night’s sleep: curtains thick enough to block out the outside light and the air conditioning that I could set to 18 degrees. And then there was the bed. As soon as I lay down on it, I knew what Dutch centre-back Micky van de Ven meant when he said: ‘When you lie down it’s really comfortable and you feel like you’re really resting… it’s top class’.

At home I sleep on an Emma mattress, which helps with painful hips. The Dux immediately calmed those hips. My sleep was still interrupted, with snatches of half-awakeness – a single night on a top-quality mattress isn’t enough to reverse years of insomnia. But what I did notice is that the amount of deep sleep I got more than doubled, and I woke up feeling much more rested than usual. ‘When the spine is aligned, you fall into a deep sleep more quickly,’ says David Jacobs, Duxiana’s UK and Ireland manager.

Is the mattress worth €10,000? Probably if you have that much money. And it’s a snip compared to the Hastens bed, made by a rival Swedish company, which will cost you hundreds of thousands. You can try Dux beds in a number of hotels around the world, including the iconic Burj Al Arab in Dubai and The Grand Hotel in Stockholm. You can even sleep outside at Sweden’s Pater Noster for a starlit experience.

But for the ultimate try before you buy, book a room at The Mandeville. If you sleep better and want your own mattress, the Duxiana store is just around the corner – and they’ll give you up to £500 back towards your hotel stay if you buy one.

Rooms with a Duxiana mattress cost from £280 per night with continental breakfast, a welcome glass of champagne and sleepy bedtime tea (mandeville.co.uk).