After the whistle blows about another mine accident, the mother runs out with her daughter-in-law Bronwyn. When she starts to run, and in the first shot at the mine, she has no scarf, neither on her head nor around her shoulders. By the second shot, she suddenly has a black scarf on her shoulders, which she later puts on her head for the iconic line about seeing her husband and her late son Ivor in heaven with God. But this scarf just materialized out of nowhere.
As Mr. and Mrs. Morgan argue about whether Huw should fight, in the camera angle that shows all three characters, Huw is right in front of Mrs. Morgan, but when there's a direct shot of Mrs. Morgan, Huw isn't close to her.