The online auction site eBay is ten years old - that's pensionable age in "internet time". But this original star of Silicon Valley's dotcom boom is still growing at over 40%, and now earns half a billion pounds a year.

As tills overflow and rivals reel, Tesco is the UK's first supermarket superpower. The Money Programme reveals its route to the top - and asks if Tesco's dominance is in the best interests of the consumer Tesco is a retail phenomenon. With profits topping £2bn a year, it has nearly a third of the UK's grocery market.