Great British Bake Off episode 2 2018: The 11 remaining bakers face a tough test in Cake Week, including a crowd-pleasing signature challenge, Prue's first technical challenge, and a chocolate collared showstopper.       Culinary competition in which amateur cooks compete in a variety of culinary challenges, hoping to be crowned Britain's best amateur baker. Contestants create a wide range of sweets and pastry dishes, before the judges cast a critical eye over their efforts. Each week, the bakers…