An Eton and Oxford educated son of a judge was part of a scam which saw celebrities conned into dodging more than £100 million in tax, a court has heard.
Jonathan Anwyl, 44, was part of the scheme, believed to be the biggest direct tax fraud in British history, which convinced the rich and famous they could cut their tax bill by investing in "ethical" environmental projects.
Led by environmental scientist and Cambridge graduate Michael Richards, 55, the scam signed up 730 celebrities, including comedians, sports stars and relatives of politicians, who were conned into believing they were investing in cutting-edge research and development reforestation projects in Brazil and China.
In reality the organisers were siphoning off huge sums for their own "secret money box accounts" in Holland and Switzerland.
Investors were told that they would be eligible for tax relief and were encouraged to make claims to Revenue & Customs for a total of £107.92 million. HMRC are now recouping the tax from the individuals involved.
Richards, who has two masters degrees from Cambridge University, made £7.4m from the scam which he spent on a £32,000 engagement ring, £1.7m property, a £250,000 bathroom extension and gave a £20,000 donation to Cambridge University to have a plaque in memory of his father erected at Gonville & Caius College.
Other defendants spent their share on a £2.4m villa in Dubai and a £2m Sussex barn conversion.
Anwyl and Richards ran the fraud using a company called Carbon Positive Trading (CPT), where Anwyl was a director, and another called Carbon Capital.
Panamanian law firm Mossack Fonseca was paid to set up the two firms, which were registered in the British Virgin Isles.
Anwyl, from Ringmer, East Sussex, the son of a retired Crown Court judge, used £788,000 from the schemes to pay off a mortgage on a property in Sydney, Australia, which he owned with his French wife, Anne.
His total profit from the scam was £1.6m.
Simon York, Director of HMRC's Fraud Investigation Service, said: "This was an audacious and cynical fraud on an astonishing scale, characterised by greed and a complete disregard for the ecological causes the perpetrators claimed to be supporting. Instead the group spent investors' money on their own lavish lifestyles.
"These individuals thought they had worked out the perfect fraud. At every step they used contrived offshore structures, complex transactions and blatant lies in an attempt to hide their tracks and detail our criminal investigation. But the determination and professionalism of our teams has shown, yet again, that we will not hesitate to bring fraudsters to justice."
Prosecutors claimed that the investments could be broken down into 80 per cent capital loans which "did not exist" and 20 per cent cash contributions.
The cash amounts were first transferred to CPT, which had been commissioned to undertake the scientific research on deforested land in Brazil and China, and on to offshore lenders Environmental Guarantee Corporation (EGC).
Incorporated on the Isle of Man, EGC then purported to lend what amounted to the investors' own money back to some of them and circulated the funds between the various entities under the group's collective control.
Of the £65m obtained from the investors only a quarter was actually spent by CPT in Brazil, China and elsewhere - roughly six per cent of the £270m promised.
Investors' funds were placed in CPT's account in the Netherlands and, once available after the circular movements, siphoned into another secret Swiss account in the name of CPL.
From there it was dispersed by the defendants.
It has has taken 10 years to bring group to justice, including a 10 month trial costing the tax payer tens of millions of pounds.
Former president of the Rotary Club of London, Rodney Whiston-Dew, 67, a solicitor, set up the off shore structures to disguise the true nature of the fraud.
Former music industry executive and business consultant Eudoros Demetriou, 77, used his contacts to add credibility to the scheme.
Businessman Robert Gold, 49, was involved as a negotiator and was second in command and made £5.3m from the scam. His father Malcom, 73, was also involved.
Mr Justice Edis, sitting at Southwark Crown Court, said: "The case involved utter dishonesty, sophisticated planning and astonishing greed hidden behind a mask of concern for the environment which added to the hypocrisy and cynicism to this case which is deeply distasteful."
He added: "The four defendants who gave evidence all professed their great, deep passion for the environment and their determination to protect it by reforestation projects which would absorb carbon and so address climate change," he said.
"Whether that was ever true for any of them was unclear.
"But by the time of this fraud I am quite certain that Richards, Gold and Whiston-Dew were simply motivated by a desire to become extremely rich and evade tax on their proceeds of crime.
"The sums involved mean that these defendants were playing for high stakes, and they have lost."
The men were sentenced for conspiracy to cheat the public revenue.
Richards and Robert Gold were jailed for 11 years, Whiston-Dew for 10 years, Demetriou was handed six years and Anwyl was jailed for five and a half years. Malcom Gold was jailed for 20 months.
Anwyl was a pupil at Dulwich College Preparatory School in London and Eton before going to Oxford.
His mother Shirley Anwyl, QC, was a circuit judge for 13 years and resident judge at Woolwich Crown Court until her retirement in 2008.
His late father Robin Hamilton Corson Anwyl is a descendant of the aristocratic Anwyl of Tywyn family, which dates back to the 12th century Welsh king, Owain Gwynedd.