More than a hundred years after the First World War, more than half a million soldiers are still missing, a third of whom are thought to be buried as ‘unknown’. 

Two years after the end of the Great War, The Tomb of the Unknown Warrior was established at Westminster Abbey and has served as a focal point for the public’s grief ever since.

Former Tornado Navigator and bestselling author John Nichol talks to Kate Gerbeau about the history of the tomb and the painstaking efforts of finding, identifying and reburying the fallen, which he explores in his new book.

They’re joined by a veteran who served in the Army for 30 years, Colonel Lindsay MacDuff, who was involved in more than 200 repatriations from Iraq and Afghanistan.