With ever-increasing numbers of passengers passing through their terminals, Britain's airports are raking in huge profits, which are only set to get bigger as they seek expansion through extra runways or terminals. In this edition of Dispatches , reporter Andrew Gilligan investigates the priorities and business tactics of the airports industry. Prod/ Dir: Roger Corke; Exec Prod: Fiona Stourton; Prod Co: Blakeway

Wednesday 27 February at 9:00pm on M4