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EPSOM, ENGLAND - JUNE 04:  Pat Smullen riding Harzand win The Investec Derby from US Army Ranger (L) and at Epsom Racecourse on June 4, 2016 in Epsom, England. (Photo by Alan Crowhurst/Getty Images)
EPSOM, ENGLAND - JUNE 04:  Pat Smullen riding Harzand win The Investec Derby from US Army Ranger (L) and at Epsom Racecourse on June 4, 2016 in Epsom, England. (Photo by Alan Crowhurst/Getty Images)

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Is this the world's greatest flat race?

In the lead-up to one of Britain's most popular sporting events, Aly Vance goes behind the scenes of what some argue to be the world's greatest flat race.

Is this the world's greatest flat race?

In the lead-up to one of Britain's most popular sporting events, Aly Vance goes behind the scenes of what some argue to be the world's greatest flat race.