The incredible 20-year-old thrilled a packed Velodrome when she beat American cyclist Sarah Hammer yesterday to win her second medal.
But little did the roaring crowd know that the diminutive heroine had fought many other battles before – when she was a little girl.
Laura was born a month prematurely suffering from a collapsed lung. She took up the sport after her parents had been told as an asthmatic she would need to take part in sport to help regulate her breathing.
And despite making cycling at speeds of up to 70km per hour look easy, Laura, from Cheshunt, Hertfordshire, has a particularly high acid lining in her stomach which means she often ends up vomiting after races.
Interviewed on TV after yesterday's victory, she said: "I thought I was going to be sick on the start line, which didn't help matters.
"But I just got going and the crowd just drove me home. I was so happy. "I was so nervous last night I couldn't sleep. Every emotion was going through my head.
"All I kept thinking was 'I just want to celebrate with my family'."
Now her second triumph at the 2012 Games has cycling stars predicting even bigger things for Laura.
She had already smashed the world record along with Dani King, 21, and Joanna Rowsell, 23, in the women's team pursuit on Saturday to claim her first golden gong.
Referring to her collapsed lung as a baby Laura said: "It's hard to believe I've gone from fighting for my life to being a world champion and competing in the Games."