Thanks for unearthing this thread,
Kuruharan, sadly relevant for the reason you gave.
Tolkien's old school, King Edward's in Birmingham, have produced 2 documentaries: One on Tolkien himself, another on his friend and fellow T.C.B.S. member Robert Gilson, who did not survive the War:
http://www.tolkiensociety.org/2016/0...-of-the-somme/