Factual error: The movie's title is factually inaccurate. The bride isn't "of Frankenstein" (the doctor), she's the bride of Frankenstein's monster.
Suggested correction: First, that's not what constitutes a factual error. At this point in time, "Frankenstein" was commonly used as the creature's name. Even today, it's understood. And in the novel, Frankenstein was never a doctor or held a doctorate of any kind. So, based on your faulty logic, it's a factual error to call him "doctor."
Suggested correction: In addition to the other corrections, the word "of" in the title can also be interpreted as meaning "from." This interpretation would allow the title to mean "The Bride from Frankenstein" or "The Bride Made by Frankenstein."
Factual error: Hannay travels to Scotland on The Flying Scotsman which ran from London to Edinburgh, The Forth Road Bridge is actually 12km further West of the Port of Edinburgh, so Hannay couldn't jump off the Flying Scotsman onto the Forth Bridge.