ASOS: How Do They Really Do It?

The secrets of the online fashion retailer, with insiders and experts revealing how it has become a global clothes-selling powerhouse in just two decades. Explores how its hi-tech website works and shows how it encourages shoppers to spend and delivers discounts by tracking their preferences, and looks at how the company took on traditional fashion chains and even bought up some of the High Street's biggest brands to become one of the UK's fastest-growing businesses

• Steven PriorDirector