A Knightsbridge house could be tripled in size by drilling that goes 50 feet underground.
But the neighbours of the homeowner who wants to do this has aren't too happy, as Marcus Powell reports.
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Gianni Versace never got to live in the four-bedroom home as he was murdered before the purchase was completed.
The pop-up, called, Annie the Owl, will open in Soho in March where guests will sit in the company of owls.
The designs were unveiled as Boris Johnson claimed the flats and houses would be built six years earlier than planned.