It's a reader find:

I came across a duplex apartment in Mayfair above commercial premises. Price: £7,500,000. I know that the stigma of living above commercial premises has become less of late, but I wonder if it's enough for someone to spend this sort of money.

He's right. It's pulling a whisker under £2,000 a square foot, but then it's Mayfair, and we think we've seen £3,000 a square foot in Belgravia.

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