The Power of One
(1992, Stephen Dorff, Morgan Freeman)
Set in 1940s South Africa but actually filmed in Zimbabwe.
John Wakefield drew my attention to this Bedford KZ.
Two other buses are more clearly seen; one is this Leyland Tiger:
This 1947 Bristol LWL6G/Eastern Coachworks is preserved in South Africa in the livery of Welkom Bus Service, Welkom (fleet number 13):
