As other High Street retailers struggle for survival, discount leader Poundland is booming. With a new store opening on average every five days, its pre-tax profits are up an astonishing 50% in a year. In this Dispatches investigation, Harry Wallop asks how Poundland sells so cheaply, yet makes so much money. He reveals the clever business tactics, marketing techniques and price comparisons used to appeal to Poundland's shoppers, and asks if consumers are getting all they had bargained for.