Nathaniel Rothschild, scion of the banking dynasty and friend of seemingly everyone in the spheres of finance, business and politics, ... has lost his libel case against the Daily Mail, which he sued for substantial damages" over its account of his and [Lord] Mandelson's extraordinary trip to Russia in January 2005. Mr Rothschild claimed he was subjected to "sustained and unjustified" attacks in the May 2010 article, which portrayed him as a "puppet master", dangling his friend Lord Mandelson in front of the Russian oligarch Oleg Deripaska to ease the passage of colossal business deals. It began on Mr Rothschild's private jet from the World Economic Forum in Davos to Moscow, where they met Mr Deripaska, the aluminium plant manager who became the richest oligarch of them all, and continued on Mr Deripaska's private jet to his chalet in Siberia. The judge rejected the notion that Mr Rothschild and Mr Mandelson had flown out as friends, not business associates, and said Mr Rothschild's behaviour had in part been "inappropriate". "That conduct foreseeably brought Lord Mandelson's public office and personal integrity into disrepute," the judge said. That leading politicians, bankers and businessmen associate with each other in fashions that blur the boundaries between work and pleasure is a secret too great to be maintained with any success, but it doesn't make the details, on the rare occasions they actually emerge, any more palatable.