At the end of the First World War, around one million citizens of the British Empire had been lost, and the whereabouts of about half of these was unknown. Families could be waiting weeks, months or years to hear whether their loved ones were imprisoned, wounded, missing or dead, if they heard at all. This was the task of the searchers. In the years following the war, these volunteer investigators conducted 5 million interviews, finding answers for around 400 thousand families. Robert Sackville-West is on Warfare to bring us the stories of those looking for news of their fathers, brothers and sons, and the evolution of the search to this day. Robert’s book ‘The Searchers: The Quest for the Lost of the First World War’ is out now.