New this month Factual error: In the scene at the beginning of the movie where two characters met in the dunes we see some white villas with seventies/eighties roof windows (Velux type).
Factual error: When the returned soldiers are on the train at the end of the film, it's an open plan post-war British Rail Mark I type, which where built from around 1950. Also the blue upholstery on the seats looks to be the corporate blue introduced by British Rail in the 1960s, used by the preserved railway owning the stock, and not what would have featured in Southern Railway carriages of the time. The carriages also have horizontally-sliding windows, which are far more contemporary than wartime trains, which had windows with a much larger vertical opening, held in place by a leather strap.
Factual error: In the silent overfly of the plane that ran out of fuel in the background you see a lot of modern architecture that is definitely not from the 1940s.
Factual error: Not until the very end of the 10-day evacuation were the French (or British for that matter) defending the very beaches themselves, and yet the movie opens with the French roadblock doing just that.
Factual error: Near the start of the film in the harbour when the camera pans around to the left looking out to sea, you can see the back of the modern Weymouth Lifeboat 17-32 moored up in the background.
Factual error: The sea often changes state from shot to shot. One minute we've got a reasonable Force 4 blowing and some surf, the next it's 'sea like a mirror' and then there's everything between.
Factual error: When the boat returns to England they state the cliffs are Dorset. There were 3 evacuation routes from Dunkirk - all to Kent. It would be nonsense to sail from Dunkirk to Dorset as you have to almost pass Dover on the way! (never mind the fact the boat would probably not have made it without refuelling).
Factual error: Oriented strand board (OSB), also known as sterling board, sterling OSB, aspenite, and smartply in British English, was not invented until 1963. The French warehouse floor was covered with it. See blood spot close up.
Factual error: Generally the clothes are not 100% of WWII. We see a lot of hats and head protection which didn't exist at that time. Also the holsters for the side guns were all closed and not open like in the movie.
Factual error: As the last Spitfire runs out of fuel, it continues to fly along the beach; then apparently turns around and flies the opposite direction along the beach still maintaining his steady low altitude. This is an impossible feat as distance flown (and any turn without power) results in loss of altitude.