Banker Nathaniel Rothschild has lost his bid to win libel damages over a Daily Mail story which he said portrayed him as a "puppet-master" who brought together Lord Mandelson and Russian oligarch Oleg Deripaska. The 40-year-old Swiss-based financier immediately said he would appeal, after Mr Justice Tugendhat ruled that Associated Newspapers had established that the meaning of the May 2010 story was substantially true, despite some admitted inaccuracies.