On 26 October 1917, 84 years ago today, thousands of Northumberland Fusiliers were cut down as they advanced towards the German line in Houthulst Forest, Belgium. Today, the forest is used by the Belgian army to store and destroy the unexploded shells and gas grenades that still lie beneath the fields. War correspondent Alan Little meets the demineurs of Houthulst who dispose of hundreds of tons of military ordnance each year and considers the longer-term impact of war, not only on those taking part but on the generations that follow.