Corrected entry: The villain's Bentley is parked at the bottom of the steps from the Albert Hall, in front of a white Ford convertible - a Zephyr or Zodiac, quite a rare car even in those days. After Harry Palmer has a fight with the villain's sidekick, the Bentley speeds away, and we see the Ford still parked by the curb. Except now, it's dark blue.
The Ipcress File (1965)
1 corrected entry
Directed by: Sidney J. Furie
Starring: Michael Caine, Nigel Green, Guy Doleman, Sue Lloyd
Genres: Thriller
Other mistake: In the Dr Radcliffe lecture scene, Harry removes his glasses to clean them revealing his poor eyesight. But in the final escape scenes when he determines and shoots the traitor, he is not wearing glasses.
Inspector Keightley: That little blonde bird you was with the other evening.
Palmer: Rita?
Inspector Keightley: That's it. What's her phone number?
Palmer: You dirty old man.
Inspector Keightley: Well, you scratch my back and I'll scratch hers.
Palmer: You ought to be locked up.
Inspector Keightley: I know.
Trivia: Len Deighton, the author of the original novel, also published a series of cookery books and wrote and drew a weekly strip cartoon-style illustrated cooking guide in London's The Observer newspaper - titled 'Len Deighton's Cookstrip'. In the first kitchen scene, where Harry Palmer is making coffee, you can see one of these strips is pinned to the wooden post next to the table.
Correction: Do you think they spraypainted the car while they shot the fight scene? There is easily enough time for the hite car to leave and the blue car to arrive during the very long fight scene.