Celia Sawyer
The average house price of the area fell during the 2007 banking crisis, but seemed to recover when an empty 1,393 square meter plot of land sold for £13.5 million ($20 million) in 2009. Rightmove lists a number of properties, almost all of which cost around £5 million ($7.5 million). In contrast, the average UK house price is around £190,000 ($280,000).
Here's what £6.5 million ($9.8 million) gets you in the 4th most expensive area in the world.