Protecting the effectiveness of leniency programmes: Applying for leniency is a leap in the dark: DHL Express - Common Market Law Review View Protecting the effectiveness of leniency programmes: Applying for leniency is a leap in the dark: DHL Express by - Common Market Law Review Protecting the effectiveness of leniency programmes: Applying for leniency is a leap in the dark: DHL Express 54 4 Common Market Law Review