What does the leak of files from offshore law firm Appleby reveal about how money is transferred out of the developing world and into the pockets of the rich? Using leaked documents obtained by German newspaper Sueddeutsche Zeitung and working with the Consortium of Investigative Journalists, File on 4 delves into the records to find out how the rich use secretive tax regimes and corporate structures to divert money via the offshore jurisdiction of Mauritius. Producer: Anna Meisel Reporter: David Grossman Editor: Gail Champion.