Great Britain's Victoria Pendleton (right) in the Women's Sprint Semi Final Race 1 against Germany's Kristina Vogel in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.

Great Britain's Chris Hoy (3rd right) competes in the Men's Keirin Second Round Heat 1 in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.

Great Britain's Victoria Pendleton (right) races with Australia's Anna Meares in the Women's Sprint Final Race 1 in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.

Great Britain's Victoria Pendleton after winning silver in the Sprint Final Race 2 against Australia's Anna Meares in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.

Great Britain's Sir Chris Hoy celebrates winning the Gold Medal in the Men's Keirin in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.

Great Britain's Sir Chris Hoy on his way to winning the Gold Medal in the Men's Keirin in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.

Great Britain's Sir Chris Hoy after winning the Gold Medal in the Men's Keirin in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.

Great Britain's Sir Chris Hoy gives a press conference after winning the Gold Medal in the Men's Keirin in the Velodrome at the Olympic Park, on the eleventh day of the London 2012 Olympics.