Cyclist Laura Trott has stormed to the top of the podium for a second time in less than a week by winning the women's omnium.

The 20-year-old, who was born with a collapsed lung and diagnosed with asthma, has become a golden girl of the track 12 years after first getting on a bike.

Earlier in the week Trott won the women's team pursuit title and, speaking after that victory, she said it had been her childhood ambition to stand on the top of the podium.

Described by British Cycling performance director Dave Brailsford as "a bundle of energy with a contagious enthusiasm", Trott, from Cheshunt, Hertfordshire, began cycling aged eight when her mother took up the sport to lose weight.

Her parents had also been told their daughter would need to take part in sport to help regulate her breathing.

The former Turnford School pupil has never looked back, with regular bike rides down the Lea Valley on a Saturday morning and visits to Welwyn track eventually leading to her progression through British Cycling programmes alongside her road cyclist sister Emma.

Now Trott has added two gold medals to her current World and European Team Pursuit and omnium titles, alongside a glut of national titles dating back to her junior days.

The double triumph is predicted to be just the beginning of her Olympic career, coming four years ahead of her initial target of competing at Rio in 2016.