My name is inspired by the British obsession with double decker buses in the 1970's.
I have a mass of approximately 60 g, and typically contain 11.4 g of fat, 40.2 g of carbohydrates, 2.7 g of protein and 1150 kJ (275 kcal) of energy.
Originally i had raisins embedded within my base layer but they were removed in 1986 in response to market research.