Tesco CEO Philip Clarke in Watford store
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Tesco unveils new superstore after profits drop

8 August 2013 Last updated at 17:05 BST

The big out-of-town hypermarket was, until recently, the place shoppers would go to buy everything under one roof.

But with more consumers buying electrical and household goods online, retailers are having to decide what to do with a huge amount of spare space.

Tesco, which recently posted a drop in profits for the first time in 20 years, has unveiled a new look superstore which it hopes is the answer.

CEO Philip Clarke gave the BBC's Emma Simpson a guided tour.