Latest Long, Long Trail research tutorial
How to trace a prisoner of war in the Red Cross records:
Other tutorials available
Other Great War videos
The 1916 Battle of the Somme film.
First of five parts, hosted by the Imperial War Museum website
Watch video (opens new window)
1976 BBC documentary presented by Leo McKern.
Rather dated in its “Lions led by donkeys” narrative but still a nicely crafted documentary with excellent battlefield scenes as they were in the 1970s: