1. Gerald Cavendish Grosvenor & family

• Net Worth: 11.4 B                                                                 
• Source of Wealth: Real state, inherited, growing
• Citizen: United Kingdom
• Age: 61

The continued success of London's booming prime property market meant a good year for Gerald Cavendish Grosvenor. The U.K.'s wealthiest landowner, also known as the 6th Duke of Westminster, saw his fortune rise $400 million this past year along with the value of real estate in Belgravia, London's most expensive neighborhood, where his family trust owns 190 acres (and where homes can sell for $150 million). His private Grosvenor Group separately owns real estate on five continents and reports just under $20 billion in assets under management. His family also has 96,000 acres in Scotland, 32,000 acres in Spain and thousands elsewhere in England.

2. David and Simon Reuben

• Net Worth: $10.5 B                                                                 
• Source of Wealth: Investments
• Citizen: United Kingdom
• Age: 70, 64

Brothers were raised in the U.K. Simon started out importing carpets and buying real estate; David in metals trading. They later joined together in Transworld, a metals trader that invested in Russia and Kazakhstan in the 1990s. Born into a Jewish family, Reuben brothers occupy the second spot in our top ten richest men of UK.  Both brothers are self-made billionaires. They were born in India to Jewish-Iraqi parents and later brought to London by their parents. While David started his business with scrap metals, Simon started with carpets and went on to purchase one of the oldest carpet companies in England. Later on both diversified into different business and merged to become second richest men.

3. Srichand and Gopichand Hinduja

• Net Worth: $8.3 B                                                                 
• Source of Wealth: Diversified & textile
• Citizen: United Kingdom
• Age: 79, 85

Together they occupy the third spot on list of richest people in the UK. Srichand is primary shareholder in the Hunduja Group. Hinduja Group has a diversified business with revenues in billions of US dollars. Permanand Hinduja was a businessman from India who had textile and import-export business. Srichand moved to London to help his father and went on to make one of the world’s largest conglomerates.

4. Charles Cadogan

• Net Worth: $5.5 B                                                                 
• Source of Wealth: Real state, inherited
• Citizen: United Kingdom
• Age: 76 

Charles Cadogan, head of one of London's richest and best-known real estate dynasties, passed the reigns onto the next generation in 2012. The 8th Earl Cadogan -- or Charles, to his friends -- stepped down as chair of Cadogan Estates, his family's 300-year-old property portfolio, 38 years after taking over its management. His son Edward, Viscount Chelsea, is now running the business. Edward is overseeing the redevelopment of Sloane Street, a popular shopping destination named after an ancestor, with a new piazza of high-end shops.

5. Philips and Tina Green

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

Philips Green is an English businessman and he is married to Tina. He was born into a Jewish family in Croydon which is located in South London. According to newspaper Daily Mail, Mr. Philips lives in Monaco for tax evasion and daily commutes to work by private jet from Monaco to UK. He dropped out of high school after death of his father. Many of his critic also point to the fact that for tax evasion, he has many businesses under name of his wife Tina Green. He is one of the richest persons in United Kingdom.

6. Richard Branson

• Net Worth: $4.6 B                                                                 
• Source of Wealth: Virgin
• Citizen: United Kingdom
• Age: 63

Mr. Branson is the founder of Virgin Group which has around 400 companies under its umbrella. He was born in suburban area of Blackheath in Southeast London. His father was a barrister while grandfather was a judge in High Court of Justice. He dropped out of the school and began trading with small things and later went on to form Virgin Group of companies. The group is involved in investments in various sectors like airlines, cell phone operators, entertainment and lifestyle. With his fortune, he qualifies as the sixth wealthiest person in the UK.

7. James Dyson

• Net Worth: $4.4 B                                                                 
• Source of Wealth: Vacuums
• Citizen: United Kingdom
• Age: 66 

An inventor and an engineer of par excellence, Mr. James Dyson made his fortune through his different types
of inventions like Dual Cyclone bagless vacuum cleaner, blade-less fan and fan heater. He founded company Dyson Limited which focuses on development of new technological products. With his wealth, he is the richest engineer in UK.

He occupies seventh spot on our top 10 richest people in the UK.

8. Laurence Graff

• Net Worth: $4.3 B                                                                 
• Source of Wealth: Diamond, jewelary
• Citizen: United Kingdom
• Age: 75 

Born in Stepney, Mr. Graff is the eight richest man in UK with his fortune. He founded Graff Diamonds in the year 1960. His company is involved in every step of jewelry making process –  from sourcing of rough stone, right from cutting to polishing and marketing of diamonds. He is also called as the richest diamond merchant in UK.

9. Anthony Bamford & family

• Net Worth: $4.2 B                                                                 
• Source of Wealth: construction equipment, inherited
• Citizen: United Kingdom
• Age: 68

Sir Anthony Bamford's family-owned farm equipment brand is so ingrained in British culture that its name is generic: a "JCB" is a backhoe, just as a Kleenex is a tissue in the U.S. Thanks to a post-recession construction boom, J.C. Bamford Excavators posted revenues of more than $4.3 billion in 2012, up almost 40% year on year. The Bamford family fortune has climbed $2 billion in the past year. Now their firm is looking to Brazil and India for growth. Former U.K. Prime Minister David Cameron, a Bamford friend and recipient of Bamford political donations, cut the ribbon at a new factory in 2012. 

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.