1 St. John's Mews didn't last very long in the Telegraph before appearing on the Knight Frank website as under offer (guide price: £12.5m). It's stunning... a RIBA award-winning home, built for the current owners, set right in the heart of Notting Hill and very original and beautiful. So much work went into it, including a computer-led design period that involved measuring light fall over a period of months, how can the current owners leave after less than two years' ownership? The kids have left and it's just too big is the line... but the piece makes it clear that the house took far longer to build than expected. For particulars, head over to Knight Frank.

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