The Queen, with the Duke of Edinburgh, presented new standards to the Household Cavalry. The Princess Royal, Prince Harry, and the Duke of Kent were also present. Later, the royal party attended a Garden Party at Buckingham Palace for members of the regiments.
Video, above. For more: Express and Hello.
This calls for badges, of course, and two of them - the badges of the two regiments of the Household Cavalry, the Life Guards and the Blues and Royals. These were sported on both her blue coat at Horse Guards Parade (in the video above) and also the pink number she switched to for the garden party (below). All the members of the family were sporting items of significance for the day, including the gentlemen in their Household Division ties.