Factual error: When Iris is unable to sleep she looks over at Amanda's bedside clock which displays 5:00 pm, however, moments later Iris discovers a button to lower the shade. There is bright sunlight coming into the room, however, in December the sun sets prior to this time (about 4:45pm according to timeanddate.com)
Continuity mistake: When Iris first arrives at Amanda's house and is rushing from room to room, her scarf is wrapped around her neck and tied, then untied, then tied. Also, when she gets out of the taxi, she is not holding a notebook. Yet, when she enters the front door, she is holding a notebook.
Factual error: The outside view of Kate Winslet's 'cottage' is not a cottage at all - in England it would be considered a large detached house and it has several rooms on the upper floor. However, the inside depicts an actual cottage: there is only one bedroom (Jude Law has to sleep on the sofa), the bathroom is too small for a regular sized bath, and the downstairs only has a couple of rooms. So the outside view of the house is large, whilst the interior is depicted as tiny.
Factual error: In the scene where Iris has landed in California and traveling to the home, she is headed the wrong way on the Pacific Coast Highway. She was headed SOUTH on PCH where there is no airport north of her to bring her to California on an international flight.had to be coming into LAX.
Factual error: When Amanda arrives in England, on the way to the cottage and at the cottage, there is snow everywhere: road, yard, field, trees. he next morning, she says it is "freezing cold" but the snow is gone and all the field is green as if it would be spring over the night.