Great Britain's Laura Trott has won her second gold of the London 2012 Olympic Games with victory in the women's omnium.

The velodrome was the day's hot ticket, with everyone from London 2012 chief Sebastian Coe and Prince Harry to NBA basketball star Kobe Bryant in attendance, anticipating success for Sir Chris Hoy and Victoria Pendleton on their final Olympic appearances. However, it was Trott's turn first.

The 20-year-old from Cheshunt won team pursuit gold on Saturday but has now won an individual title to join an elite club of British females to have won double gold at a single Games, including Dame Kelly Holmes and swimmer Rebecca Adlington.

Sarah Hammer of the United States was second, with Annette Edmondson of Australia third.

Trott said: "I cannot believe this is happening to me. I was losing my head a little bit between the events because they weren't going the way I wanted them to.

"I was a bit nervous going into the last 500 metres. I'm never normally that nervous because I am good at it. I can make up some room but I didn't want to be that far behind - Sarah Hammer is the strongest rider out there.

"Not many people can put three points into Sarah Hammer. It was just about hanging on, focusing and that power - totally on the limit. I am so happy."

Trott was two points behind Hammer entering the final discipline, the 500 metres time-trial, but claimed her third win from six disciplines to overhaul the deficit and win by a point. She clocked 35.110 seconds, with Hammer finishing fourth in 35.900 as a jubilant Trott triumphed on 18 points, with Hammer finishing with 19.

The effervescent Trott celebrated with family and team pursuit colleague Dani King before riding a lap of honour draped in the Union Flag as the capacity crowd chanted her name.

Edmondson finished second in the 500m time-trial to secure bronze, with Canada's Tara Whitten fourth.