Dan Snow hears soldiers experiences of the First World War as it was fought on the Gallipoli Peninsula in 1915 - from enduring the constant threat of shell and sniper fire, the intense heat and lack of drinking water, to terrible sanitation which was as life-threatening as the battles themselves, and the troops' eventual evacuation in the winter. Drawing on the vivid and moving recollections of veterans in the sound archives of the Imperial War Museums and the BBC.