When you have a budget of £65m to design the interior of your home, the sky is really and truly the limit, and that was certainly the case for Real Housewives star Dawn Ward and her company.

The interior designer, along with her team at Arista Interiors, was tasked with the mammoth challenge of decorating Phones4U billionaire John Caudwell's mega mansion, who is also a close personal friend.

Dawn consulted with John to come up with a plan for the 110-room 43,000 sq ft Mayfair property that is over nine floors, spending £6m on furniture alone. Now completed, the 15-bedroom property is worth £250m, becoming the most expensive home in Britain.





(Image: Channel 4)





"It's astronomical but honestly, for the quality and a house of this size, it's actually quite a tight budget," Dawn said in the one-off Channel 4 documentary Britain's Most Expensive Home: Building for a Billionaire.

Following the release of the documentary, Dawn gushed over how proud she was to see it all on screen.

She wrote on Instagram: "I’ve put many posts up over the years but this one is so important to me personally. Firstly I want to say a huge thank you to my dear friend @johncaudwell for believing in me and my team and giving us the opportunity to absolutely smash it.

"Secondly I want to thank every single team member of my team at @aristainteriors because without you guys it wouldn’t be possible. Our whole office is buzzing today, 5 years on the drawing board and we’re finally going to see, what I believe is the best project in not just the UK but in Europe."

Dawn finished: "Feeling blessed and super proud of my whole team, a massive thank you from the bottom of my heart."

(Image: Channel 4)

The property actually began life as two separate buildings, a mansion and a townhouse, bought by former phone tycoon John for around £87m, that then became one mega mansion.

He allowed Channel 4 cameras inside as the project was being wrapped up racing to finish in time for his birthday in October 2018, going millions over budget.

It proved technically difficult when it came to joining both the basements of the properties together, which was eventually turned into an underground entertainment complex.





That includes a spa, a full-equipped gym, and pool room, as well as a bar, nightclub and a full-size cinema all to be enjoyed by the owners.

The exterior sees two separate properties, with a courtyard linking the townhouse to the main mansion, and underneath an eight-car mechanical stacker makes up for the lack of space for a fleet of cars.





Four guest bedrooms and bathrooms make up the new townhouse with a reception room and hall.

There's even a 14,000 sq ft ornate ballroom which can be used to host numerous extravagant functions.

As well as colour schemes chosen for different parts of the house, around 20,000 sheets of gold leaf were installed around the property costing around £28,000 alone.

John's main aim in building the most expensive home in Britain is to attract a more A-list stars to his annual charity ball. He's even seen on the phone trying to secure Simon Cowell's attendance to draw a bigger crowd.

Executive producer Dan Barraclough said of the show: "This incredible access gives us a glimpse into the world of the truly mega wealthy, where every whim can be realised, but where things can still go wrong, as on any building site.

"At the heart of the program is the intriguing character of Caudwell himself - a tough taskmaster, but also a committed philanthropist.

Show more

"He is a man with huge wealth, but one who still counts the pennies, the boy from Stoke who has set his heart on a home in the 'old money' world of Mayfair. It makes for a fascinating character portrayal."

Britain’s Most Expensive Home: Building For A Billionaire is available to watch now on All4