Plot hole: It doesn't make sense that Mary is English with a heavy English accent, while both her brother and father are obviously 'Aussies'. Even if she was adopted to an Australian family, she wouldn't claim to be English, she would be a naturalised Australian.
Walkabout (1971)
1 plot hole
Directed by: Nicolas Roeg
Starring: Jenny Agutter, David Gulpilil, John Meillon, Luc Roeg
Plot hole: It doesn't make sense that Mary is English with a heavy English accent, while both her brother and father are obviously 'Aussies'. Even if she was adopted to an Australian family, she wouldn't claim to be English, she would be a naturalised Australian.