I thought it would be useful to collate links to any rare, unusual or puzzling old British motorsport film clips from the 1940's and 1950's. These can be commercial or amateur. Ideally ones that are accessible on the Internet.
Here are three to start with, taken on the personal 9.5mm cine camera of Derek Buckler designer of Buckler cars but cameraman uncertain at times, as Derek appears in his own car.
https://www.youtube....h?v=RSd13Mz83L8 unknown event circa 1948 - 53
https://www.youtube....h?v=JjD5Qq5gpLY Lydstep speed hillclimb, Tenby, Wales April 8 1950
https://www.youtube....h?v=aMsXNpWOzNU Prescott April 1949. Test day including Buckler prototype and the unveiling ceremony of the Bugatti Memorial Gate