Qatar-backed Qatari Diar bought a former British Army site for $1.3 billion; its new 10,000-square-foot London penthouse is now listed for $64 million

One of London's most exclusive new homes has arrived on the market with a price tag to match. According to an exclusive report by The Wall Street Journal, a newly completed duplex penthouse at the Chelsea Barracks development in Belgravia has been listed for £48 million (around $64 million), marking it as one of the city's most expensive penthouses currently for sale.