Jessica Ennis has lived up to the hype with an astonishing 800m win, cementing her already dominant position in the heptathlon and securing her a gold medal.

The ecstatic 26-year-old from Sheffield lit up as she crossed the line and the capacity crowd Olympic Stadium erupted.

After crossing the line in two minutes 8.65 seconds - a new British record - she bent double before lying on the track staring into the sky.

Taking a Union flag from members of Team GB and draping it over her shoulders, she led all her fellow heptathletes on a parade lap of the stadium, stopping to hold hands with the others and bow to the crowd.

Fans jostled for photos as Ennis, jumping up and down in excitement, sent deafening cheers ringing round the arena.

The Duke and Duchess of Cambridge, Prime Minister David Cameron and Olympics supremo Lord Coe were among those in the stadium for the what rapidly turned into an extraordinary evening of sport.

Her victory came after Britain's golden girl enjoyed a strong first day on Friday, setting a British record in the 100m hurdles, a personal best in the 200m, and a clearance of 1.86m in the high jump.

On Saturday, she put in a 6.48m long jump, making her just one of two athletes to earn more than 1,000 points in the discipline.

She went on to throw a personal best of 47.49m in the javelin.

Ennis' final score was 6,955 points put her 327 points clear of her nearest rival.