2012 Olympics: Great golden hopes
Jessica Ennis: athletics, heptathlon
British athletics' golden girl missed Beijing through injury but has responded by being nearly unbeatable since.
Sir Chris Hoy: track cycling, Keirin
Scotland's most successful Olympian is seeking a fifth gold to draw level with Sir Steve Redgrave and the Keirin, which begins with several laps behind a motorised Derny bike, is his favourite event.
Rebecca Adlington: swimming, 800 metres freestyle
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Hide AdThe double Olympic champion faces fierce competition in the toughest endurance event in the pool but can deliver once more.
Nicola Adams: boxing, flyweight
Won the second of two world silvers just after returning from a year out with a crippling back injury. Injury-free she should win.
Ed Clancy,