Marking what would have been Queen Elizabeth II’s 100th year, this landmark documentary tells the story of her life alongside a century of momentous change in Britain. Through archive and eyewitness reflections, the film explores how she led the monarchy through profound social, political and cultural change. Contributions from some of Britain’s best-known faces and international figures, including Dame Helen Mirren, Sir David Attenborough, Barack Obama and Queen Camilla, reveal how she remained a constant in a changing world.