London fashion week: Burberry boss Christopher Bailey talks tech

Burberry's fashion show at London fashion week marks a turning point, according to many industry watchers.

It is the final show in which clothes will be previewed for future seasons - from now on it will be possible to buy all clothes as soon as they have been shown on the catwalk.

Christopher Bailey, head of Burberry, explained to the BBC's Emma Simpson, why the change is happening.