Peter and Autumn Phillips with daughters Savannah and Isla at the Royal Windsor Horse Show, which is held in the grounds of Windsor Castle in Berkshire. (Photo by Steve Parsons/PA Images via Getty Images)
Peter and Autumn Phillips watch daughters Savannah and Isla on a climbing wall during the Royal Windsor Horse Show, which is held in the grounds of Windsor Castle in Berkshire. (Photo by Steve Parsons/PA Images via Getty Images)
Peter and Autumn Phillips daughter Savannah, on a climbing wall during the Royal Windsor Horse Show, which is held in the grounds of Windsor Castle in Berkshire. (Photo by Steve Parsons/PA Images via Getty Images)
Peter and Autumn Phillips with daughters Savannah (right) and Isla at the Royal Windsor Horse Show, which is held in the grounds of Windsor Castle in Berkshire. (Photo by Steve Parsons/PA Images via Getty Images)
