Harely Cokliss - The Atrocity Exhibition (1970)
Directed by Harely Cokliss (no imdb page exists) and features Ballard talking about some of the ideas which would coalesce into his novel Crash, published in 1973. Intercut with footage of test motor crashes and Ballard himself are semi-dramatised scenes with actress Gabrielle Drake. Remarkably effective and disturbing.
Gabrielle Drake in the TV series UFO