Factual error: The underground station shown is not St. James Park, which would be 1 stop east on the District line. St. James Park has green and yellow tiles on the wall indicating District and Circle lines. The platform in the film has black and brown tiles, indicating Northern and Bakerloo lines, neither of which serve St. James Park.

Darkest Hour (2017)
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Directed by: Joe Wright
Starring: Gary Oldman, Kristin Scott Thomas, Lily James, Ben Mendelsohn
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Winston Churchill: Those who never change their mind never change anything.
Question: In the 'War Room' scene, there appeared to be a sheet of plastic or acetate covering the wall with the map of the enemy's movements. Was that premature for plastic to be available in that size for that time frame?
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Answer: It was probably Perspex, an acrylic plastic commonly available at the time, used for, amongst other things, fighter plane cockpit canopies and windscreens.
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