Factual error: When Cruella first drives her iconic car, being in Britain the driver's seat should be on the right side, not the left.
Suggested correction: Cars can be imported from overseas. It's very possible the car was imported from America.
Factual error: When Cruella as a child makes her way to London and crosses the zebra/pedestrian crossing, there are visible zig zag markings. These however were not introduced until 1971 in England, which is the time period when Cruella is older.