Clare Balding introduces live coverage from the heart of London as the Coldstream Guards troop their colour on Horse Guards Parade. Marking the official birthday of His Majesty the King, this world-renowned spectacle, full of music, majesty and military precision, culminates with the annual RAF flypast and the royal family's iconic balcony appearance. Radzi Chinyanganya is on the ground, speaking live to those associated with this remarkable day. Audio-described commentary is available on Red Button and BBC iPlayer. There is also commentary-free, uninterrupted coverage of the live events in London on BBC iPlayer.