Image: Nine men wearing Second World War-era military uniforms each sits astride a motorcycle. Each man is wearing a helmet with goggles, and all are arranged in a line abreast of one another
Motorcycle despatch riders, March 1944. Sir Hugh Cairns advocated military use of motorcycle crash helmets during World War II

Image courtesy of Alan Bullock and 'The First Norton WD 16H and BIG 4' website ( Not to be reproduced without permission