http://www.stuff.co.nz/entertainment/film/9529989/Hot-names-star-in-NZ-based-sci-fi My memories of what I did at primary school fades a lot these days but Z for Zachariah was one novel I vividly remember and am excited to see it getting the big screen treatment.
Is it an action premise with bad guys or monsters or is it just about these people surviving on their own in a people-less world?
No monsters, IIRC. Ann was in the valley when the attacks occurred. The man (only one in the book) had roamed the country searching for survivors and drank from a contaminated stream and got sick.
IIRC this was made (by the BBC, I think) with Anthony Andrews in the role of the man. I remember really enjoying seeing this back in the day, and reading the book as a kid. It's uncanny that I should log on and see this here because I was only thinking about Z for Zachariah the other day!