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Billionaire tycoon George Soros has given another £400,000 to an anti-Brexit group in a bid to keep Britain in the European Union.

The Hungarian-born investor’s donation to Best for Britain, revealed by BuzzFeed, came after he faced criticism previously for giving money to the same group.

Mr Soros, one of the world's richest men, had previously pledged to match the total received by the pressure group from a crowd-funding campaign, which garnered about £100,000.

The latest donation also came in the wake of the Cambridge Analytica scandal, which allegedly had links to a data firm contracted to the Vote Leave campaign during the Brexit referendum.

The tycoon had previously denied accusations that he was "undermining democracy" and hit back at what he called "toxic personal criticism" against him.

Writing in the Mail on Sunday, he said Best for Britain had his "wholehearted support" and that he had never made a secret of his opposition to Brexit.

Brexit: Article 50 Triggered - In pictures 20 show all Brexit: Article 50 Triggered - In pictures 1/20 Britain's ambassador to the EU Tim Barrow delivers British Prime Minister Theresa May's formal notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to European Council President Donald Tusk in Brussels AFP/Getty Images 2/20 Prime Minister Theresa May speaks during Prime Minister's Questions in the House of Common PA 3/20 Britain's ambassador to the EU Tim Barrow delivers British Prime Minister Theresa May's formal notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to European Council President Donald Tusk in Brussels AFP/Getty Images 4/20 5/20 6/20 7/20 European Council President Donald Tusk holds a news conference after receiving British Prime Minister Theresa May's Brexit letter in notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to EU Council President Donald Tusk in Brussels, Belgium Yves Herman/Reuters 8/20 Prime Minister Theresa May takes her seat after announcing in the House of Commons PA 9/20 The time 12:20pm shows on Big Ben on March 29, 2017 in London, England. The British Prime Minister Theresa May addresses the Houses of Parliament as Article 50 is triggered and the process that will take the United Kingdom out of the European Union begins Carl Court/Getty Images 10/20 D-day: pro-EU protesters outside of the Houses of Parliament today as Theresa May prepares to trigger Article 50 AFP/Getty Images 11/20 EU Council President Donald Tusk holds British Prime Minister Theresa May's Brexit letter which was delivered by Britain's permanent representative to the European Union Tim Barrow (not pictured) that gives notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty in Brussels, Belgium Yves Herman/Reuters 12/20 PMQ's in The House of Commons PA 13/20 Jeremy Corbyn speaking at PMQ's in The House of Commons Sky News 14/20 Theresa May leaving for the House of Commons Jeremy Selwyn 15/20 Mayor of London Sadiq Khan at the headquarters of Vivendi in Paris where he took part in TV interviews to discuss the imminent triggering of Article 50 by the UK to leave the EU Stefan Rousseau/PA 16/20 Britain's permanent representative to the European Union Tim Barrow arrives at the EU Council headquarters for as meeting before hand delivering British Prime Minister Theresa May's notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to EU Council President Donald Tusk in Brussels, Belgium Yves Herman/Reuters 17/20 Britain's ambassador to the EU Tim Barrow arrives at the British representation of the European Union in Brussels Aurore Belot/AFP/Getty Images 18/20 A giant headed Theresa May in Parliament Square, London during a protest by Avaaz after PM signed a letter to trigger Article 50 that starts the formal exit process by the UK from the European Union David Mirzoeff/PA 19/20 British Foreign Secretary Boris Johnson walks down Whitehall Jack Taylor/Getty Images 20/20 Britain's PM Theresa May signs the official letter to European Council President Donald Tusk, invoking Article 50. AFP/Getty Images 1/20 Britain's ambassador to the EU Tim Barrow delivers British Prime Minister Theresa May's formal notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to European Council President Donald Tusk in Brussels AFP/Getty Images 2/20 Prime Minister Theresa May speaks during Prime Minister's Questions in the House of Common PA 3/20 Britain's ambassador to the EU Tim Barrow delivers British Prime Minister Theresa May's formal notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to European Council President Donald Tusk in Brussels AFP/Getty Images 4/20 5/20 6/20 7/20 European Council President Donald Tusk holds a news conference after receiving British Prime Minister Theresa May's Brexit letter in notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to EU Council President Donald Tusk in Brussels, Belgium Yves Herman/Reuters 8/20 Prime Minister Theresa May takes her seat after announcing in the House of Commons PA 9/20 The time 12:20pm shows on Big Ben on March 29, 2017 in London, England. The British Prime Minister Theresa May addresses the Houses of Parliament as Article 50 is triggered and the process that will take the United Kingdom out of the European Union begins Carl Court/Getty Images 10/20 D-day: pro-EU protesters outside of the Houses of Parliament today as Theresa May prepares to trigger Article 50 AFP/Getty Images 11/20 EU Council President Donald Tusk holds British Prime Minister Theresa May's Brexit letter which was delivered by Britain's permanent representative to the European Union Tim Barrow (not pictured) that gives notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty in Brussels, Belgium Yves Herman/Reuters 12/20 PMQ's in The House of Commons PA 13/20 Jeremy Corbyn speaking at PMQ's in The House of Commons Sky News 14/20 Theresa May leaving for the House of Commons Jeremy Selwyn 15/20 Mayor of London Sadiq Khan at the headquarters of Vivendi in Paris where he took part in TV interviews to discuss the imminent triggering of Article 50 by the UK to leave the EU Stefan Rousseau/PA 16/20 Britain's permanent representative to the European Union Tim Barrow arrives at the EU Council headquarters for as meeting before hand delivering British Prime Minister Theresa May's notice of the UK's intention to leave the bloc under Article 50 of the EU's Lisbon Treaty to EU Council President Donald Tusk in Brussels, Belgium Yves Herman/Reuters 17/20 Britain's ambassador to the EU Tim Barrow arrives at the British representation of the European Union in Brussels Aurore Belot/AFP/Getty Images 18/20 A giant headed Theresa May in Parliament Square, London during a protest by Avaaz after PM signed a letter to trigger Article 50 that starts the formal exit process by the UK from the European Union David Mirzoeff/PA 19/20 British Foreign Secretary Boris Johnson walks down Whitehall Jack Taylor/Getty Images 20/20 Britain's PM Theresa May signs the official letter to European Council President Donald Tusk, invoking Article 50. AFP/Getty Images

He said: "The fact that conditions are unsatisfactory does not mean that they can't get worse. That is what has happened in Britain.

"Before the referendum Britain was doing better economically than the rest of Europe. But this has now been reversed, with Continental economies powering ahead while Britain lags behind."

Hungarian-born Mr Soros, one of the world's richest men who made a billion dollars betting against sterling on Black Wednesday in 1992, said Britain would "lose much of its global influence" outside of Europe.