Zara Phillips - a royal olympian on the GB equestrian team. She's 14th in line for the throne (in case you were wondering). Today's course included a replica of the Tower of London.
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Princess Anne, left, mother of equestrian rider Zara Phillips, attends the equestrian eventing dressage phase with her father, Prince Phillip the Duke of Edinburgh
HRH is a distinguished sportswoman, competing for the GB Equestrian event team at the 1976 Montreal
Openly gay British dressage rider Carl Hester helped his team win gold at the 2012 Olympics.