All these wee cars photographed in competition mode remind me of the Ralph Watson BSA. Built around 1950 from a BSA V twin car as a fun sports car for both road use and competition, the car proved hugely successful. View attachment 3299280 This car did thousands of miles on the road, as well as many hill climbs and race meets. Ralph later developed the car even further, building his own rotary valve cylinder heads. Ralph later built another sports car for road and race use using a flat four Lycoming aircraft engine - incredible to watch and listen to. Both cars still exist in good hands, and regularly come out for Vintage racing. There is much information about Ralph and his cars on the 'web' - too much to include here. look for "Ralph Watson Special Engineer"