New Cross Speedway track (SE London) staged a Stock Car meeting in the very late '40's (1948/9?). A short show was put on during a normal, Friday night, speedway meeting. I cannot remember the name of the promoter but most of the drivers were American servicemen, many thousands still based in the UK after the War. About a dozen or so Servicemen, using their own garishly painted up cars which they had driven to the meeting, put on a spectacle that was almost unbelievable to my then young eyes. The servicemen could not take the cars back to the States, for reasons of liability for import/export duties etc.(but many did of course); they could not sell them quickly or easily after getting their repatriation back to the States Notices, so they drove them 'into the ground' whether on a track or not.