Joining the city’s Apprentice Jockeys’ School requires more than being able to gallop a horse, as Britney Wong and Nichola Yuen found out. Piercing the predawn mist at Sha Tin, floodlights illuminate a deserted track. There are no cheering crowds or flashing betting boards – just the crisp crunch of hooves on turf. For Hong Kong’s aspiring jockeys, the gruelling daily grind begins at 4a... [1077 chars]