13. William Bollinger
Net worth: £400 million.
Age: 60.
Bollinger may have retired from the London-based Egerton Capital hedge fund he co-founded with John Armitage, but he still has a 50% stake in the group's parent company.
His wealth was boosted over 2015 after Egerton bet against energy stocks.
12. Andrew Law
Net worth: £425 million.
Age: 49.
The former Goldman Sachs trader is the chairman, chief executive, and major shareholder in New York-based hedge fund Caxton Associates.
He was born in Manchester and sponsors the educational sector's Multi Academy Trust in Greater Manchester. He and his wife also run the Law Family Charitable Foundation.
T=10. Ian Wace
Net worth: £465 million.
Age: 52.
Wace, one of the duo that makes up the Marshall Wace, sold a 25% stake in their hedge fund to the US private equity group KKR, making £50 million.
Both Wace and Paul Marshall also gained £93 million worth of KKR shares in the deal. Here he is (far right) with another fund manager, Arpad Busson, and the Duke and Duchess of Cambridge.
T=10. Paul Marshall
Net worth: £465 million.
Age: 56.
Marshall, alongside Wace, made £206 million in profits at Marshall Wace last year.
Fun fact: Marshall's son Winston is a member of the globally famous band Mumford & Sons (pictured).
9. John Armitage
Net worth: £500 million.
Age: 56.
Armitage, who runs Egerton Capital, made a killing last year after betting against crashing energy stocks. Armitage has a 50% stake in the group, meaning his dividends are pretty stellar.
He was a major donor to the unsuccessful Remain campaign in June's referendum of Britain's membership of the European Union.
8. Chris Rokos
Net worth: £660 million.
Age: 45.
The cofounder of Brevan Howard initially retired at the age of 41 after he made £590 million from the group. However, he's now back in the game with the recently launched Rokos Capital Management.
He is notoriously private and not much is known about his private life, nor are there many pictures of him in the public domain.
7. Sir Chris Hohn
Net worth: £720 million.
Age: 49.
The Children's Investment (TCI) Funding Holdings, which Hohn cofounded in 2003, has £6.7 billion of assets under management and had a stellar year — it delivered a 14% return in 2015. Hohn took home £57 million.
However, Hohn had to fork out £337 million to ex-wife Jamie Cooper in 2014 when they divorced.
6. Crispin Odey and Nichola Pease
Net worth: £900 million.
Age: 57, 55.
Odey is no longer a British billionaire. Last year, he personally lost £200 million as profits at his hedge fund plunged to £84.1 million in 2015.
Odey is a controlling shareholder in Odey Asset Management, which has $13.4 billion in assets under management. As well as falling profits, Odey's salary was slashed from £31.8 million to £16 million.
His wife, Nichola Pease made £26 million when she sold her stake in JO Hambro Capital Management.
Odey was one of the founding members of "Vote Leave," the campaign group that successfully convinced Britain to vote to leave the European Union earlier this year.
5. Alan Howard
Net worth: £1.04 billion.
Age: 52.
Howard's position fell this year due to his Brevan Howard Master Fund falling by 1.99% last year.
Meanwhile, assets under management for the whole firm almost halved over the last two years to $23.7 billion.
4. David Harding
Net worth: £1.15 billion.
Age: 54.
Harding is a Cambridge-educated physicist who manages $30 billion worth of clients' cash at his firm Winton Capital.
Harding, who founded the hedge fund in 1997, has received £437 million in dividends since 2006. He was a prominent donor to the pro-EU group Stronger in Europe ahead of June's referendum on EU membership.
3. Sir Michael Hintze
Net worth: £1.28 billion.
Age: 62.
Hintze's London-based hedge fund CQS made £95.7 million in profit in 2014 and doled out £23 million in dividends. The former Australian army captain's CQS group manages £9.7 billion in client funds.
Like Odey, Hintze is a founding member of Vote Leave.
2. Robert Miller and Princess Marie-Chantal and family
Net worth: £1.58 billion.
Age: 82, 47.
Robert Miller made his fortune through cofounding the Hong Kong-based Duty Free Shoppers chain in 1960 and he retains a 38.75% stake in the group despite selling it to LVMH in 1998.
However, today most of his wealth is invested in his own hedge fund. Search Investments, his own family office, has managed his money since 1974 and controls SAIL Advisors, a company that manages funds of hedge fund portfolios.
His daughter Marie-Chantal Miller was born in London, England, and is the Crown Princess of Greece, Princess of Denmark after marrying Pavlos, the son of former King Constantine II of Greece, who was deposed in 1973.