Watch: Household Cavalry give three cheers to the Queen
The 'one-off' gesture came as the regiment dismounted following the Platinum Jubilee Pageant.
A video has emerged from within the confines of the Household Cavalry's Knightsbridge barracks of the regiment performing three cheers for Her Majesty the Queen.
The Household Cavalry Mounted Regiment consists of the Life Guards and the Blues and Royals and is based in one of London's wealthiest neighbourhoods.
Captured from an elevated position overlooking the square at Hyde Park Barracks, the film depicts a rare example of the ceremonial happenings that usually go on behind closed doors.
Watch: Household Cavalry give three cheers!
In the video, the entire regiment is seen formed up just moments after returning to base following the jubilee pageant.
On the far side of the square, the Household Cavalry Band can be seen wearing their iconic gold state coats.
Next to them, the Blues and Royals Squadron has formed up in two ranks. In the foreground, members of the Life Guards, wearing red tunics, are seen atop their horses.
Leading the three cheers, a soldier is seen in the immediate near ground facing his regimental colleagues while conducting the gesture.
The regiment is now preparing for its annual Summer Camp in Norfolk following a busy "silly season" of state ceremonial occasions.