When Tanny crashes the Mercedes, a large plastic hubcap is shown flying through the air. His car has original Mercedes alloy wheels. The steering wheel with the deploying airbag shown in the picture does not belong to the Mercedes either.
When John Newland (Byrne) is outside in the stables talking to his wife Nancy, he is not wearing any neckwear. Yet in the next scene when they are inside, just before he confesses his secret to her wife, he sports a gray silk ascot tie.
The shadow of a boom mic is visible above Mathilda's mom, when Mathilda begins to cry.