Spying tends to be a fairly secretive game, for obvious reasons. So eyebrows have been quizzically raised (a bit like Roger Moore's 007) following the naming of the woman apparently favourite to become the new chief of MI6.

This week, David Yelland and Simon Lewis explore the murky world of leaks. Who benefits from them, why are they done and just how damaging can they be?

They'll explain why leaking is far from victimless and reveal their own experiences of turning on the news and realising someone is out to get you.

And in the extended episode on BBC Sounds, have the Beckham's lost control of their PR? With pages of newspaper coverage devoted to their supposed family rift, David and Simon look at when two PR tribes go to war.

Producer: Duncan Middleton