The mother of Alan Duckworth who is heard briefly but never seen, and who is uncredited, is played by actress Maureen Lipman, wife of the film's screenplay writer Jack Rosenthal.
The school is what is now Wimbledon Chase Primary School, but was then Wimbledon Chase Middle School. At least one of the real teachers of the time was used as an extra - you can see her saying 'shush' to children in the school hall. She is now (2009) the head teacher.