Saudi billionaire Prince Alwaleed bin Talal has sued Forbes magazine for libel in a British court, alleging its valuation of his wealth at $20bn (€15.2bn) was short of the mark by $9.6bn.

SAUDI billionaire Prince Alwaleed bin Talal, an investor in some of the world’s top companies, has bought a stake in Twitter for $300 million (€226m), gaining another foothold in the global media industry.