Dan Snow adds a new perspective to one of the most terrible battles in British history in this special documentary Dan Snow's Battle of the Somme. Dan analyses the newly digitally restored film 'The Battle of the Ancre' and the 'Advance of the Tanks', an archive film of the last offensive of the 'Battle of the Somme' filmed from the front line. The film also introduced the latest British military technology to the nation: the tank. What new insights will the restored film unveil? What became of those who were in it? Was any of it faked? These questions and more are all explored as Dan Snow uses the film to piece together the events of those few dark days in 1916.