Acting wasn't terrible
If you consider the fact that 99% of the people in this film were just people who showed up wanting to be extras the acting isn't terrible.
Take George Hardy (the dad) for example. Standing by itself his acting is terrible. But if you throw in the fact that he is a dentist by profession and had some terrible lines, he didn't do a terrible job. I think the same thing can be said for most people in this film (except the mother who was just beyond awful).
What does everybody else think?