According to a new survey by the Hurun Global Rich List, 56 sterling billionaires now live in Britain.
Approximately half of the country's richest residents are foreign, drawn here by the schools, lifestyle, stability and the authorities' relaxed attitude to their tax and business affairs.
Among the new wealthy are Farhad Moshiri, an Iranian-British businessman who owns 15% of Arsenal Football Club, and Indonesian petrochemicals and textiles millionaire Sri Prakash Lohia, who spent an estimated £50 million restoring his London home.
They appear alongside such established UK billionaires as Sir Philip Green, the retail tycoon, and property magnate the Duke of Westminster.
Below are the country's top ten richest residents, and a look at how they came to be so rich.
1. Leonard Blavatnik
Ukrainian-born American Blavatnik, 56, has made his £10.8 billion fortune through investments in oil, coal and property and is the owner of Parlophone Records and the Warner Music Group. He recently donated £75m to found the Blavatnik School of Government in Oxford.
2. Lakshmi Mittal
Mittal, 63, is the owner of a £10.2bn fortune. He made it in the Indian steel business, and is now the owner of the world's largest steel manufacturer. His three properties in Kensington Palace Gardens are believed to be worth £500m.
3. Srichand Hinduja and family
The Indian born magnate, 78, is the chairman of the Hinduja group, and made his wealth in textiles, Bollywood films, weapons and oil. His £300m home near Buckingham Palace is believed to be the world's third most expensive.
4. John Fredriksen
The Norwegian-born Cypriot shipping tycoon, 69, is worth £6.9bn, and made his fortune in the Iran-Iraq war of the 1980s. He owns the world's largest shipping fleet.
5. Gerald Grosvenor
The 6th Duke of Westminster, 62, is the wealthiest landowner in Britain. His £6.6bn fortune is founded on his family's ownership of 190 acres of Belgravia, one of London's most exclusive areas, and he also owns prime real estate on five continents.
6. Hans Rausing
The 87-year-old is the co-inheritor of the Tetra Pak fortune, and his wealth is estimated at £6.6bn. He divides his time between Sweden, the Bahamas and Britain, where he breeds deer and wild boar on his sprawling estate.
7. Roman Abramovich
The Chelsea FC owner, 47, started out selling plastic ducks on the streets of Moscow, and is now worth £4.8bn. He made his fortune in the oil industry in the 1990s, after the Soviet Union's assets were stripped by private speculators. The oligarch now has interests in steel and mining.
8. Bruno Schroder
With wealth estimated at £3.5bn, the 80-year-old is the fourth generation in his family to run the asset management firm Schroders. He spends most of his time in Dunlossit Castle on the Isle of Islay, where he lives with his wife, Baroness Suzanna von Maltzahn.
9. Charles Cadogan
The 8th Earl of Cadogan, 76, heads a property empire with addresses in some of London's most affluent postcodes. His own home in the capital is believed to be worth £20m.
10. Sir Richard Branson
The British-born businessman and entrepreneur, 63, has a fortune estimated at £3.5bn. He set up his first business, a mail order record company in 1970, and his Virgin Group now comprises more than 400 companies. Branson lives on Caribbean idyll Necker Island, in the British Virgin Islands, a tax haven.