The 12 new bakers don their aprons and head for the iconic tent. Their first signature challenge is to make a madeira cake. It's a well-loved cake, but which of our bakers will try to impress by reinventing this classic, and who will play safe in a bid to get perfect madeira with its traditional crack? With one challenge out the way, the bakers face their first technical - Mary's frosted walnut cake, a pre-war classic that is as British as they come.