Abu Dhabi could buy luxury Mayfair hotels from Barclay brothers

But long-standing minority shareholder Paddy McKillen believes complex legal agreements between the shareholders effectively weaken the brothers’ hand

The innovators: build and launch your own satellite … for £20,000

Technology used in mobile phones and laptops can now be used to track planes, follow tankers seized by pirates and even spot people flouting planning laws

Number of ultra-rich swells to almost 173,000

The world gained an extra 5,300 UHNWIs last year and, as with other people worth $30m or more, they like property and luxury items in a big way

This year’s development summits have many mountains to climb

The central goal of the 2015 summits is to chart a course towards the eradication of extreme poverty, more equitable globalisation, and climate stability, writes Kevin Watkins

Cartier owner’s shares hit by Swiss currency turmoil and Hong Kong protest

Shares in Swiss watchmakers were hardest hit, because the central bank’s decision to scrap the currency cap will make their goods more expensive in vital foreign markets