Continuity mistake: When Spud is shown tripping over the chair knocked over by Johnny at the end of the film, his feet are shown clear of it. When the shot changes as his men arrive to help him up, his feet are suddenly completely entangled within the framework.
Factual error: In the scenes set during 1918, Clive is shown wearing a typical late 1930s/WW2 military production British steel helmet with its distinctive canvas covered sprung chinstrap.