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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If approved the increase would trigger a county-wide referendum.
Martin Gallagher was in Euston station when he saw Grace Georgina crying - she had lost her ticket and was unable to get home to Liverpool.
Always bound to raise a few eyebrows, the fourth plinth in Trafalgar square is one of the capital's most famous places to display artwork.