Cadbury is to become the first mass-market chocolate brand to adopt the Fairtrade certification mark... The confectionery group will certify 300m of its Cadbury Dairy Milk chocolate bars as well as its packaged cocoa, at a cost of £1.5m ($2.1m), by the end of summer... Harriet Lamb, the chief executive of the Fairtrade Foundation, said Cadbury’s move...would “throw down the gauntlet” to other big chocolate manufacturers. [also refers to Tate & Lyle, Starbucks, McDonald's, Unilever]