In part 2 of this edition of BBC Sounds, Mike Powell brings you the latest, exclusive update of an ongoing aviation industry problem that won’t go away. Pilots, crew and now passengers allege the air we breathe on board aircraft can do us harm. Mike hears from people who’ve lost their jobs or been involved in emergencies. It’s an in-depth look at alleged toxic air on the world’s planes. Start broadcast at the 27 minute mark.