The Daily Telegraph have reported that Blair’s family property appears to be growing at staggering rate; the article had originally appeared in the daily Mail. It is now believed that that their expanding portfolio now totals seven homes, including four in central London, and is worth in the region of £14 million.

A Grade II-listed town house is the latest addition to their portfolio which is just a few streets away from the Blairs’ £3.7 million Connaught Square mansion. The house was secured at a knock-down price of £200,000 under its asking price of £1.5 million by Mrs Blair and their son Euan.

Land Registry documents revealed they used a mortgage to buy the property together in April.

It was not clear whether the mortgage was taken out by Mrs Blair or her son, who reportedly received a six-figure bonus from investment bank Morgan Stanley this year.

His spacious new town house boasts three bedrooms, two bathrooms, a bespoke designer kitchen, study, dining room and garden.

Friends said Euan had ‘outgrown’ the two-bedroom basement flat he bought two years ago in Islington, North London.

He has accepted a £500,000 offer for the flat but is staying there while builders refurbish his new home.

The Blairs’ architect Simon Templeton has already submitted plans to install a skylight as well as a gate in the railings outside the listed property.

Euan’s new home could soon rival his younger brother Nicky’s nearby mews house, dubbed the ‘ultimate lads’ pad’.

Nicky, bought the £1.13 million property with his mother last year, mortgage-free.