What are the Pandora papers?

The Pandora papers are the the latest – and largest in terms of data volume – in a series of major leaks of financial data, and reveal how some of the world’s richest people are using hidden offshore tax havens. So, how does the offshore world actually work? Is it always illegal? And why is this all such a big deal? The Guardian’s Luke Harding explains Subscribe to Guardian News on YouTube ► Pandora papers: biggest ever leak of offshore data exposes financial secrets of rich and powerful ►