To survive in an increasingly competitive market, UK retailers need to balance sales and margin growth or to find growth through new retail services. This report uses data from the new Forrester Analytics Retail Competition Tracker, 2015 To 2018 (UK). The tracker includes data from Amazon, ASOS, Currys PC World, Debenhams, eBay, H&M, John Lewis, Marks and Spencer, Next, Primark, Sports Direct, Very, WHSmith, and Zalando.