• Think-tank financed by tycoon co-ordinated covert letter to Theresa May
  • Christopher Chandler funded Legatum Institute after making a fortune in Russia 
  • He helped Vladimir Putin's associates take control of the energy giant Gazprom 
  • Chandler and his brother, Richard, became rich in post-Soviet 'wild capitalism'
  • Institute economics head was 'third man' in Gove and Johnson's Brexit demands 
A Russian link to Boris Johnson and Michael Gove’s successful plot to persuade Theresa May to take a tougher stance on Brexit has been uncovered by The Mail on Sunday.
This newspaper has established that a secret letter sent by the Cabinet Ministers to the Prime Minister was co-ordinated by a senior figure in a free-market UK think-tank founded by a tycoon who made a fortune in Russia following the collapse of the Soviet Union. 
The financier who established that think-tank, the Legatum Institute, also helped President Vladimir Putin’s associates to take control of Russia’s state energy giant Gazprom.
The institute’s economics director, Shanker Singham, was the ‘third man’ in drawing up Johnson and Gove’s Brexit ultimatum, which this newspaper disclosed last month.

The organisation, which operates from a townhouse in London’s affluent Mayfair, was set up using some of the fortune that secretive New Zealand-born tycoon Christopher Chandler made with brother Richard from a string of investments, some of which were made during the ‘wild capitalism’ of the post-Soviet economy.
Tonight one leading MP called for an investigation by Parliament’s intelligence and security committee into the Legatum Institute and its influence on the Government.
But an Institute spokesman strongly defended the charity’s influence in the Brexit letter, and denied that Mr Chandler had played any role.
It comes amid a separate political row over claims that the Kremlin secretly interfered in both Brexit and the election of Donald Trump. This newspaper has traced thousands of pro-Brexit social media posts to a ‘troll factory’ based in St Petersburg.
Mr Singham and Mr Gove were both at a behind-closed-doors Commons seminar on Brexit on Friday, which was also attended by No 10 and officials from the US Embassy. All guests were sworn to secrecy.
The Mail on Sunday photographed Mr Singham as he slipped out of the meeting on Friday afternoon.