BRITAIN’S golden girl Jessica Ennis spoke of her “amazing feeling” after claiming Britain’s first ever heptathlon gold medal at the World Championships on a memorable night in Berlin.<br /><br />The 23-year-old led the seven-discipline event from start to finish, eventually securing a landmark success with victory in her heat of the 800m.<br /><br />Ennis finished with an impressive 6,731 points – 238 clear of Germany’s Jennifer Oeser and Olympic champion Nataliya Dobrynska in third.<br /><br />“It’s been the longest two days of my life but the best,” a delighted Ennis said. “I can’t believe it. I’m the world champion, I feel like crying.<br /><br />“I’ve dreamt so many times about winning medals and becoming world champion, doing a lap of honour. It’s the best feeling in the world. I can’t even put into words how I feel right now, it’s such an adrenaline rush and such an amazing feeling.”<br /><br />Victory was even sweeter for Ennis given that she missed out on the Beijing Olympics last summer due to a stress fracture to her right ankle which almost ended her career.<br /><br />“I was at such a low point last year so to come back from that and so strongly, it’s amazing,” she added.<br /><br />Minutes after Ennis’ success came a moment of history when Usain Bolt put in a sensational performance to shatter his own 100m record set in Beijing last summer, by 0.11 seconds. <br /><br />The Jamaican raced home in an incredible 9.58 seconds ahead of American Tyson Gay (9.71) and countryman Asafa Powell (9.84).<br /><br />Britain’s Dwain Chambers came home sixth in a season’s best 10.00.<br /><br />“I knew it was going to be a great race and I came out and executed it,” Bolt said. “It’s a great time. I did well and I feel good in myself.”<br /><br />Meanwhile, Olympic champion Christine Ohuruogu only just squeezed into the final of the 800m, while David Greene is into today’s men’s 400m hurdles final.