Corrected entry: After Bentley's execution, the camera zooms in on the Bentley family home from a bird's-eye perspective. The film is set in 1953, but there are cars parked in the courtyards behind the houses that date from the 1980s.
Pierrepoint is depicted as having a London accent. In real life, however, he was from the north of England, and had a Yorkshire accent, which sounds completely different. This is proved in a BBC interview with him, dating from the 1970s.