Retailer, Marks & Spencer, is linking up with London store, Selfridges, to bring an exciting new concept in shopping to Manchester. Selfridges is taking up 120,000 sq ft of space in M&S's flagship store in Manchester's city centre. M&S will also trade in 120,000 sq ft. The innovative design will allow customers to shop in both M&S and Selfridges across a central internal mall between the two stores.