Retail guru Mary Portas sets out to keep Britain's small shopkeepers in business by sharing the tricks of the trade with failing boutiques. Diane Lazzaris runs One One Seven, a Surrey boutique which recently made an annual loss of 100,000 pounds. Concerned that the shop appears to lack passion and flair, Mary takes Diane to a Chelsea boutique for some presentation inspiration before testing her styling skills during a magazine photoshoot. Can One One Seven be saved, or is its number truly up?