Guards on ceremonial duty close out this three-part series with rehearsals in London for Trooping the Colour, the annual parade marking the monarch's official birthday. The cameras follow the drilling alongside the Coldstream Guards, framed here as the regiment's ceremonial rivals, as both units work through the formations and timing the parade demands. With almost no other detail supplied about this final episode, the film's value is mostly in watching the preparation itself: the repetition, the precision drilling, and the coordination between two regiments who will share the same ground on the day. It closes the series on the practical side of ceremonial soldiering, the rehearsal work that never appears once the parade itself is underway.