Secrets of the Supermarket Buyers will see Denise meet with current and former buyers from Britain's biggest supermarket chains to find out just how they decide what to sell to the nation's consumers. From the discount disruptors to the premium grocers, the series will lift the lid on the tactics used by behind-the-scenes buyers to get popular items into stores and, ultimately, into shoppers' trolleys. How do they predict demand and what the next big trends will be?