Factual error: A scene in a photographic darkroom shows Michael Gambon developing a colour print in a dish under safe lights. Not possible. Colour printing must be carried out in pitch dark usually inside a light tight print processor, as colour photographic paper is sensitive to all wavelengths of visible light.
Other mistake: Police find a blood stained T-shirt belonging to the boy Liam behind his bed, this is supposed to be the shirt Liam wore when he killed Pettigrew. In fact Liam went to Pettigrew's place with no top on, so where does the T-shirt come in?
