John Hannavy is a writer and photographer with a passion for engineering history. His work regularly appears in heritage magazines. A retired academic, he has written extensively on railways and other forms of transport, steam-powered machines, the history of photography, and the industrial development of Victorian and Edwardian Britain. He is a Fellow of the Royal Photographic Society, and was Centenary President of the British Institute of Professional Photography, whose Fellowship he also holds. His 2020 book Transporter Bridges – an illustrated history is also published by Pen & Sword.