The offshore bank account details of 2,000 "high net worth individuals" and corporations – detailing massive potential tax evasion – will be handed over to the WikiLeaks organisation in London tomorrow by the most important and boldest whistleblower in Swiss banking history, Rudolf Elmer, two days before he goes on trial in his native Switzerland. British and American individuals and companies are among the offshore clients whose details will be contained on CDs presented to WikiLeaks at the Frontline Club in London. Those involved include, Elmer tells the Observer, "approximately 40 politicians". Elmer, who after his press conference will return...