DR MILES RUSSELL is a senior lecturer in archaeology at Bournemouth University. His earlier book, Piltdown Man: The Secret Life of Charles Dawson, was nominated for the British Archaeological Book Award 2004. STUART LAYCOCK is a historian and writer. His earlier book, Britannia: The Failed State, was nominated for Current Archaeology Book of the Year 2009. He has also written All the Countries We Ever Invaded for The History Press.