Fanta has been named the poorest performing brand in the UK over the last year, according to a new survey. Sales have fallen 13% a year since 2003, according to Intangible Business. The fastest-growing brand was Actimel, the probiotic drink manufactured by Damone. The UK's most valuable brand is still Coca-Cola, worth £1bn. Pepsi is in 10th place at £248m. The Sunday Telegraph The Mail on Sunday The Independent on Sunday