The Queen was moved to tears in a moment captured on camera during a Platinum Jubilee celebration.
The monarch's granddaughter Lady Louise, daughter of Prince Edward and his wife Sophie, led a tribute to Prince Philip by driving his carriage around the arena at the finale of the Gallop Through History event staged by the Royal Windsor Horse Show.
It was a poignant moment for the Queen, as 18-year-old Lady Louise shares her grandfather's passion for carriage driving - Prince Philip helped establish it as a sport in the UK.
Since the 1970s, carriage driving was one of the Duke of Edinburgh's favourite pastimes. He raced carriages near Norfolk before representing Britain at several European and world championships.