Many of the nation's favourite treats are getting smaller, but BBC research has found that some prices are falling too. Manufacturers often blame the rising cost of ingredients. But whether it is the ingredients, exchange rates, or saving us from obesity and bad teeth, all manufacturers insist that they give customers value for money.The price of a product is driven by all kinds of factors such as packaging, transport and marketing which might not change with alterations in weight.But many consumers will be concerned simply with the price they pay at the checkout per pack or bar.
