English, color, 80’s on tv, 3 to 4 women, 1 a locksmith, plot and pull off a safe crack and get a black garbage bag full of cash. They hide the money in the roof of a van (vw?) and they go through a check point. Realizing the bag is showing a little, they tuck it back up with a nail file. My impression is Australia but not sure.
Set It Off (1996)?
https://www.imdb.com/title/tt0117603/
Maybe Widows (1983), British mini series. I only saw the American remake which changed the plot to art theft. But I think the original version they crack a safe.