Part one of two. How supermarkets Lidl and Aldi have created shopping destinations in their middle aisles, luring in customers with eclectic products they never realised they needed and creating social media sensations. Denise Van Outen uncovers the clever psychological strategies behind the seemingly disorganised middle aisles, discovering how the German discount supermarkets exploit consumer's fears of `missing out" to encourage them to keep coming back for more deals.