LONDON  - Jade Jones won Great Britain's first Olympic taekwondo gold medal and Servet Tazegul earned Turkey's first gold of this Games on Thursday. Teenager Jones gained revenge on double world champion Hou Yuzhuo of China with a 6-4 success in the final, making up for her reverse to the world number two at the same stage of last year's World Championships. And Tazegul added Olympic gold to the world title he won last year by beating the same man again in Iran's Mohammad Bagheri. It was Turkey's first gold and only their second medal of any colour at these Games.