Cadbury Trebor Bassett hopes to appeal to tweenage' chocolate lovers with its new bar based on pop group Westlife. The bar is made from Wispa chocolate with a Westlife image moulded onto the side. There are five bars ­ one for each band member. The wrapper features a picture of the band on the outside and a print of their signatures inside. Cadbury said that tweens were a core chocolate singles consumer group and accounted for 29% of the total chocolate population. Westlife bars are available from July 16. Rsp: 29p. Separately, Cadbury is running a 25% extra free promotion on Fudge singles. And Chomp is relaunching with a 10p price mark. {{MARKETING - P&P }}