How a factory makes 432 million classic British crumpets every year from a precise combination of ingredients, using some clever chemistry to create their famous 'holey' texture. The science of making the perfect pancake batter. How another British favourite, Eccles cakes, are made in Manchester for shipment all over the world. The history of how crumpets got their rise and eventually their bubbles, and Britain's obsession with toasting baked goods.

Cast of this episode