Blair's record in the property market has not been a happy one. Buying at the top of the market and selling at the bottom is not, in accepted wisdom, the way to make profits. Perhaps he learned his economics from Gordon. However - shock - it seems his Connaught Square home is amongst those in London that have risen in value by 51% since February 2009, surpassing the peak values of 2007.
The Standard reported last night on the new London bubble in the 'bonus belt', and I think bubble is exactly the right description. If Blair had an ounce of nous he would sell now, as quickly as possible. Don't hold your breath.