The Queen was seen looking happy and relaxed as she enjoyed a horse ride at Windsor Castle on Wednesday.
The monarch, 90, was spotted dressed in a beige coat and matching shawl, which she tied round her head, as she rode the small black horse alongside two others in the grounds of the castle.
It came as the Duke of Edinburgh was also seen driving his carriage behind security barriers while a police officer stood guard.
Barriers were put in place around the royal residence in Berkshire on Monday evening to support existing road closures for the ceremony, Thames Valley Police said.
The force said the changes were "proportionate and necessary" but that there was "no specific threat to Windsor".