What components define a traditional English breakfast?

A traditional English breakfast is defined by the five pillars: British back bacon, British pork sausages, fresh eggs with liquid yolks, a traditional regional pudding, and a heritage fried starch (bubble and squeak or fried bread). Without all five, the professional standard is not met. Around this core, traditional accompaniments such as baked beans, grilled tomatoes, and mushrooms provide necessary moisture and acidity.