WW1 - War on Two Wheels: A fascinating insight into the role of the bicycle in the First World War - from reconnaissance to transporting ammunition, historian and cycling enthusiast Jeremy Banning explores stories from the battlefield. Ollie Bridgewood discovers the role cycle scouts played in the Army Cycling Corp and rides the original bikes used in the conflict. Mark Beaumont meets the grandson of a WW1 soldier who rode for the Highland Cyclist Battalion and survived brutal combat on the front line.