Gunner Christie Farren and her horse Somme take over a Horse Guards sentry box. This week the Kings Troop Royal Horse Artillery took over from the Household Cavalry to provide the Queens Life Guard at Horse Guards. More usually associated with the ceremonial gun salutes and musical rides with their 13lb guns, they took on the role of both mounted and dismounted guard at the entrance of Horse Guards.
This year, for the first time, they are using Knightsbridge Barracks, the home of the Household Cavalry Mounted Regiment, for the period of their duty, as opposed to Wellington Barracks, which they have used in previous years. Londoners can now enjoy the spectacle of a different uniform and a different army regiment at Horse Guards on Whitehall
Photographer: Sergeant Rupert Frere RLC