BT had the most successful year of growth of all British brands, findings by the Brand Finance Global 500 survey showed Tuesday. The annual study found that BT's brand value soared 70% to £9.3bn in 2013. "Its content focused strategy, investing huge sums in Rugby and in particular Premier League football to challenge Sky, appears to be paying off," Brand Finance said. The consultancy also noted 22% growth by Burberry, with its value up at £2.5bn despite Chief Angela Ahrendts's decision to exit the company. It also highlighted TUI Travel as the most valuable travel brand worldwide, with a 25% jump in its brand value to £2.4bn, while Vodafone was found to be the overall most valuable brand in the UK, at £17.9bn. HSBC was the most valuable bank brand having grown by £2.4bn, while RBS saw its value decline by the same amount. Within the supermarket sector, Tesco's brand value declined £157m, while Asda was down £12m. However, Sainsbury soared 33%, taking its brand rating from AA+ to AAA-. NR