Pete, I don´t think Sterling Moss ever dragraced himself but he seemed to be interested in the sport. As for cars beeing left in the U.K. after this event, I haven´t heard of it. But definitely in the seventies.
Al Eckstrand has Swedish ancestors I think.

He came to Sweden in 1969 and raced a Mustang at Mantorp Park, when the track had been opened for the first time.