Charlie.
What a question for a Saturday morning!
This was a unique one-off parade with the actual form of the parade framed by the Adjutant and the Regimental Sergeant Major, based on the ceremony of Trooping The Colour. In modern times only the Queen's Colour is on parade and trooped along the ranks of the battalion - as per the annual Bde of Guards Troop on the Queen's birthday.
In her speech to the 1st Battalion at Brentwood Her Majesty Queen Elizabeth the Queen Mother said "As I watched the traditional movement of Trooping the Colour, performed with such splendid precision, my thoughts went back to some of the epic landmarks in the long history of the Regiment."