An excerpt from Nigel Slater's 'Eating for England' ( Fourth Estate Ltd, 2007): 'There used to be an unwritten law that a Tunnock's Caramel Wafer be included in every packed lunch, although the less law-abiding among us might have been known to sneak any old bar into the long, narrow margin between the sandwich and the side of the box. Rectangular bars of sesame, dates, apricot, almonds, spirolina, sunflower seed, pumpkin seed and carageen moss have replaced the layers of crisp wafer, toffee and thin, milky chocolate that make up a Tunnock's.'