gets down to the hockey centre in lea valley if you can to watch england's women this weekend.retire after this summer's world championships in london. as a defending world champion, bolt has got an automatic place in the jamaican team for the august championships so won't have to compete at the national trials. his prime minister has been leading the tributes to the eight—time olympic champion. clearly he's not just clearly he's notjust a track figure, he is a public figure, he has his private life and he's still a young man but what i admire about the same bolt is that he has managed to excel, to reach the pinnacle of his sport without any suggestion of impropriety —— about usain bolt. without any artificial enhancements to achieve what he has done. that is so valuable today in competitive sport, that someone can achieve the great feat of humankind without artificial enhancements. that, to me, is notjust a value to jamaica, as ambassador, but value to the sport. and to people as well, that if you work hard, you don't need to cheat, you don't need to use artificial enhancement