By Kate Palmer BBC News "No words of mine can soften the blow. There is one consolation for you - your daughter became unconscious immediately after she was hit, and she passed away perfectly peacefully." This was how Minnie Wood, a 36-year-old matron, comforted the parents of one of her young nurses, Nellie Spindler, who was killed by a shell during the First World War's Battle of Passchendaele in 1917.