Gary Sheffield is Professor of Modern History at King's College London. He is a Fellow of the Royal Historical Society, and author of Forgotten Victory: The First World War - Myths and Realities and The Somme. He broadcasts regularly on television and radio, and writes for the national press. He lives in Oxfordshire.
Dr John Bourne is Director of the Centre for First World War Studies at the University of Birmingham. He is a Fellow of the Royal Historical Society and Vice-President of the Western Front Association. He has written widely on the First World War, including Britain and the Great War 1914-1918 and Who's Who in the First World War. He lives in Birmingham.
Louis Smith is a 23-year-old star gymnast, winning Olympic silver and bronze medals at London 2012 and becoming champion of the BBC's Strictly Come Dancing. Find out more about Louis at louis-smith-official.com, tweet him on @louissmith1989, like him on Facebook facebook.com/louissmithofficial, see his photo stream at flickr.com/photos/louissmithofficial and watch videos at youtube.com/user/LouisSmithOfficial.