The royal attended the Royal Windsor Cup on Sunday.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Mad Dogs (left) and UAE play out the final of the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II watches carriages from the British Driving Society during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Gillian Anderson (left) during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II presents prizes to carriages from the British Driving Society during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Chris Eubank (left) and his son Chris Eubank Jnr during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II presents prizes to carriages from the British Driving Society during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II presents the trophy to the UAE team after winning the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Queen Elizabeth II during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.
Chairman of Conservative Party Brandon Lewis (2nd left), Minister of State for Immigration Caroline Nokes (centre right) and Chancellor Philip Hammond (right) during the OUT-SOURCING Inc Royal Windsor Cup at the Guards Polo Club, Windsor Great Park, Egham, Surrey.