William 'Bill' Clements served in the Royal Ulster Rifles and the Royal Irish Rangers, commanding the 1st Battalion. He was Defence and Military Attache at the British embassies in Beijing and Rangoon.
He has long had a fascination for fortifications and is the author of Towers of Strength, Martello Towers Worldwide and The Fatal Fortress - The Guns and Fortification of Singapore 1819 – 1953 (all in print with Pen and Sword). He has contributed articles to the journals of the Fortress Study group, the Military History Society of Ireland and the Society for Army Historical Research. In 2011 he was elected a Fellow of the Royal Historical Society.