Zara Tindall’s sporting summer: the royal looks every inch the elite athlete as she prepares to compete at the Burghley Horse Trials

One of the nation’s most acclaimed equestrians, Princess Anne’s daughter has garnered a world championship gold and an Olympic medal – now, as she steps up her competition schedule, Zara Tindall looked cool, calm, and collected while preparing for one of the season's most illustrious events