When a Ukranian oligarch bought a London penthouse in 2014 for £140m it became the capital's most expensive flat, 800 times more expensive than the average house price in London. With London prices beyond most normal people's reach, luxury shops filled with goods most people can't afford, what has happened to the make-up of the capital and how was it allowed to happen? Journalist and author Oliver Bullough took us on a tour of Knightsbridge to explain about the nomadic elite, shell companies and why somethi
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