This photo, from Old Classic Car, shows the Allard Atom at speed on Wimbledon Speedway. Taken in October 1955, driver Cyril Brine is leaning out to see how high the front wheel will lift on a bend. Powered by a 500cc JAP speedway engine the car was claimed to be the smallest racing car in the world. Built by Wimbledon Speedway controller Ronnie Greene in conjunction with designer Sydney Allard, the little car had a 5ft 4in wheelbase and rear axle offset, to assist speeds on corners. No brakes were fitted and the only controls were clutch and throttle.
The Atom can be seen at speed on YouTube.