Alistair Brownlee: Not just the home favourite, he is the hottest property in triathlon. The 24-year-old Yorkshireman has dominated the sport over the past three years, winning twice already in Hyde Park, and is a two-time European and world champion. His biggest challenger for gold is his younger brother Jonny.
Simon Whitfield: Triathlon has only been an Olympic sport since 2000, when Whitfield won the inaugural gold medal in the men's race despite crashing on the bike. He finished 11th in Athens four years later but was back on the podium in Beijing in 2008 when he picked up the silver medal behind Germany's Jan Frodeno.
British team: Given Britain's history in the sport it seems incredible that the host nation are still looking for their first Olympic medal. Since the maiden World Championships in 1989, British athletes have won 12 titles, more than any other country except Australia. It would be a major surprise if the Olympic duck was not broken in London.
DID YOU KNOW?
Alistair Brownlee almost chose a very different path in life. The Bradford Grammar School pupil won a place at Cambridge to study medicine, following in the footsteps of both his parents, but after a term at Girton College he gave it up to return home to Leeds and focus on his sporting career.
FIRST APPEARANCE AT THE GAMES