Continuity mistake: When Colin speaks with Nancy at Juliet and Peter's wedding reception he puts the 'dead baby finger' hors d'oeuvre into his mouth in the first shot, but when he spits it back out into his fingers in the next shot, not having chewed or swallowed any, the hors d'oeuvre is quite a bit smaller.
Continuity mistake: Juliet arrives at Mark's flat and brings banoffee pie with her, wanting to see the wedding video. She slips the video into the VCR and places the open pastry box on top of the TV stand. As she takes her jacket off the pastry box is gone, yet in the next shot of the TV the box is right next to the remote, which then changes position in the last shot when the remote disappears. The TV is in the center of the stand in some shots, but to the left of the stand in other shots. The video cassettes, etc., change/alter their position within these shots as well.
Continuity mistake: During the final scenes in the airport, as Juliet and Peter run toward Jamie and Aurelia, in the first shot passing on Juliet's right is a bearded man in a suit jacket. In the next shot as Juliet kisses Aurelia the same man just walks through the doorway and starts to pass Juliet. Then in the next shot he enters once again walking behind Jamie. There are others in the terminal whose positions also differ in consecutive shots.
Revealing mistake: In the big scene at the children's show when David and Natalie are revealed kissing behind the curtain, many members of the audience are shown snapping picture after picture. One of the guys who is snapping away very rapidly has a "throw-away" one-time use camera. All one-time use cameras have wind wheels, meaning you can't take photos that quickly.
Continuity mistake: When David, the Prime Minister is introduced to the household staff, his tie changes between shots, while talking to Natalie and then when he walks into his study and closes the door.
Continuity mistake: When Juliet and Mark are at his flat there is a tall metal self-standing hanging rack and a tall black art canister directly in front of certain canvases and frames. As Juliet inserts the video in the wide shot, the rack and canister are gone. Yet, in the next shot they are back.
Continuity mistake: After Sarah has called at Harry's office, Harry prepares to open his office door to see her out. The camera cuts back to Sarah for a moment, then back to the camera angle on Harry as she walks to the door. In that short space of time, the sliding cupboard doors have changed their configuration, and the blinds in the upper left of the frame have partially closed.
Continuity mistake: When Mark is at Juliet's door letting her read the big cards he wrote for her, there is a shot where he shows her the photos of supermodels, he hopes to date on the card, then in the second shot of the card, when he is about to change cards, the photo at the top of the card is taken out and the ones at the bottom change position.
Continuity mistake: When Sam sneaks past the airline employee in the first shot the jewellery salesman unloads the employee's arms and tosses his coat over his left arm, then puts his gloves into his left hand and takes his luggage with his right hand. However, in the next shot the gloves have vanished.
Continuity mistake: After the airline employee does not allow Sam through to the gate the jewellery salesman loads his bag, coat and gloves into the arms of the employee which gives Sammy a chance to run for it. The position of all his belongings in the arms of the airline employee changes between shots.
Continuity mistake: Sarah walks into Harry's office, sits down and much of her hair is tucked behind her ears in the side shot. In the next few front shots her hair is first draped straight down, then tucked a bit, and when she stands up in the side shot her hair is positioned as the first side shot, all without her ever touching her hair.
Factual error: In the scene where Karen plays the album "Both Sides Now" by Joni Mitchell, she cries to the title track "Both Sides Now". A shot of the CD player indicates that track 7 on the album is playing, but "Both Sides Now" is track 12 on the actual album.
Continuity mistake: When Sarah and Karl are making out on Sarah's bed they are interrupted by Sarah's phone ringing. On her bed side table the alarm clock reads 11:53 in the first shot, but in the next couple of shots it reads 11:47.
Continuity mistake: In the scene where the Prime Minister goes to Natalie's house and they have a conversation with her at the top of the staircase, her fringe changes several times from shot to shot. From a distance, it is combed neatly, whereas close up it is pieced and messy.
Continuity mistake: At the end of the film in the airport, Colin returns with Harriet. They meet Tony there, and you can see Harriet's sister Carla come round the corridor. Then Harriet turns to introduce Carla, and you can see her blonde hair and arm come onto the screen. But in the next shot, it shows Carla walking towards them, much much further away from where she just was.