Tesco launches virtual store at Gatwick Airport

* Travellers use smartphones to select produce

* Home delivery avoids returning to empty fridge

* Initiative builds on success of South Korean experiment

LONDON, Aug 7 (Reuters) - Tesco, the world's No. 3

retailer, launched an interactive virtual grocery store at

Britain's Gatwick Airport on Tuesday to help holidaymakers shop

for their return using their smartphones.

Tesco said the facility builds on its launch of a virtual

store in Seoul, South Korea, last year, which allowed commuters

to shop in subways and at bus stops by pointing their mobile

phones at billboards.

Travellers from Gatwick could avoid returning home to an

empty fridge by scanning images of products like milk, bread,

cheese, wine and chocolate with their smartphones and arranging

a home delivery.

UK consumers are expected to spend 4.5 billion pounds ($7.02

billion) using mobile devices in 2012, a 53 percent rise on

2011, according to data from the Centre for Retail Research.

Once one of the most consistent British companies in terms

of earnings growth, Tesco stunned investors in January with its

first profit warning in over 20 years.