Chitty Chitty Bang Bang (1968)

Factual error: When Chitty Chitty Bang Bang arrives at the Potts' house, Grandpa Potts is sitting in a deckchair reading a very modern colour edition of National Geographic magazine.

Factual error: In the scene where the spies are hanging the false backdrop off the bridge, you can see that the railway lines they cross have concrete sleepers, which is out of period (railway lines at this time would have had wooden sleepers).

Factual error: After they pick up Truly Scrumptious in the newly refurbished Chitty Chitty Bang Bang, look at the road surface as they run alongside the GWR train. There is a broken white line running down the centre of the road. These types of markings weren't introduced in England until the blackouts of WW2.