If you’ve ever thought about what the parcel of land beneath your feet is worth, now you know. Thanks to Hamptons International.  Their latest survey - or “London Heat Map” as it has notionally be named - suggests that there are five markets iin London with an average price in excess of £1000 per sq ft (SW&, W8, SW3, W11, and W1).  Acroos the London market, as a whole, the average price was £798 per square foot.  So, now you know.