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UNITED KINGDOM - JUNE 13: An ensuite bathroom off the master bedroom seen inside an apartment in Trevor Square, Knightsbridge, London, UK, Tuesday, June 12, 2007. Luxury home prices in London, the world's most expensive city, may increase at a slower pace this year as more properties come onto a market with fewer buyers,real estate broker Knight Frank LLC said. (Photo by Graham Barclay/Bloomberg via Getty Images)

UNITED KINGDOM - JUNE 13:  An ensuite bathroom off the master bedroom seen inside an apartment in Trevor Square, Knightsbridge, London, UK, Tuesday, June 12, 2007. Luxury home prices in London, the world's most expensive city, may increase at a slower pace this year as more properties come onto a market with fewer buyers,real estate broker Knight Frank LLC said.  (Photo by Graham Barclay/Bloomberg via Getty Images)