10. Joe Lewis

• Net Worth: $4.2 B                                                                 
• Source of Wealth: Investments
• Citizen: United Kingdom
• Age: 76

Sharing the ninth spot of richest people in UK with Mr. Bamford, Joe Lewis is a British billionaire who derives his wealth through investments in different firms. Though a citizen of UK, he resides in Bahamas to avoid high taxation in Britain. In the 80s and 90s, he made huge chunk of money in currency trading and later became an investor.