Guest of honour: Team GB sprinter Richard Kilty (not pictured) wrote on Instagram: 'Watchi...
Zara competed on the same team as former Olympic champion Victoria Pendleton during the charity match
Her Majesty seemed to be in high spirits as she joked with her guests during this evenings reception
Flower girl: Camilla looked radiant as she carried a bouquet of flowers after meeting guests and performers
Camilla found time to speak with many of her guests this afternoon. Pictured here chatting with singer Jamelia
Newly-appointed business, energy and industrial strategy secretary Greg Clark (pictured) was among the first guests to be greeted by the Queen
The Queen took the opportunity to catch up with her fellow royal, the King of Bahrain
The Duchess was in a remarkably good mood as she smiled and greeted the hundreds of guests that awaited her arrival
The Duke and Duchess also enjoyed some time inside the castle where they enjoyed chatting to the many guests at the party
The Queen's granddaughter and her rugby player husband took their five-month-old to the Salperton Park Horse Trials this weekend.