Other mistake: The girls paint their van with brushes before heading off. When the van is being driven later in the film as they make their getaway, it's obviously been airbrushed, as it's too smooth a paint job.
Continuity mistake: During the scene at the festival, note the guy with the long hair, round sunglasses, and a purple & gold silk indian shirt. 1st seen bottom left corner, when the camera pans to the actor's view. Then watch how many times he shows up. In front of, behind, just about everywhere. In fact on the day of filming, he was awarded 'extra' in most scenes. That was by the film crew, before any editing, and was given Dave Stewart's hat for his trouble. Submittted by the extra himself.
Continuity mistake: Early in the film, Mandy gets a tattoo all down her back. It is very big, noticable and colourful. However when the girls are in the art gallery near the end, just after she fires from her shotgun, she turns her back to the camera and the tattoo is gone.
Factual error: The hospital scenes were shot at Newham University Hospital, which was (and still is) a modern, well-equipped hospital. Everything in the scenes is blatantly anachronistic: a scene set in 1968 is full of furniture, fittings, and advanced medical equipment that is from the very late Nineties when this scene was shot.