Episode 2

Marks & Spencer's is investing almost half a billion pounds this year into new stores. The biggest is at Lakeside Shopping Centre, but it's a race against time to get it ready for Christmas. Cameras also follow product- developer Abbie, who wants to revolutionise the biscuit market with a new twist on traditional classics. And presenter Davina McCall pitches to the lingerie team in the hope of getting her own range stocked at M&S.