Investigative journalist Heidi Blake has helped break some of the biggest scandals of recent history: 'Westminster for sale' lobbying, 'generals for hire' defence deals, bribery at FIFA, and worldwide corruption in tennis. In this in-depth interview she challenges cynics, arguing investigative journalism is in its ‘golden age’, reveals some of the methodologies used to expose the rich and the powerful, and their counter techniques to block investigation; discusses the variety of sources from cab drivers to senior government officials, and wryly recounts the tale of travelling to Bulgaria for an undercover sting - only to end up the victim of one herself.