Visible crew/equipment: Martha Jordan enters the room when Mr Robson is interviewing Brian about the assault on Jessica. As Brian leaves the room she walks towards Robson and a shadow of the camera and a sound man holding a boom mike can be seen on her green jacket.
Continuity mistake: When Justine intervenes when the grid iron crew are ganging up on Tegs, one crew member wearing a yellow T shirt with the number 55 under an unbuttoned white shirt drops his black helmet, which Ted picks up. When the crew run after Justine and Tegs as they run off, next shot on the stairs "number 55" is wearing the helmet, then as the crew chase after Justine and Tegs, as they leave through a fire door "number 55" is holding his helmet in his right hand.
Plot hole: Chrissy is pushing her baby Jay in her pram into the school playground. Justine and Luke call out to her from an upstairs window, then come out to meet Chrissy. They come down from an upstairs floor to the playground in five seconds, which is not enough time.
Factual error: Justine and Maria are in Justine's bedroom. Justine is showing Maria the photos on her bedroom wall of her family and school friends. There is a photo of Banksie and Zammo on the wall. These two boys left Grange Hill at the end of series 10. Justine started in series 11, so she would not have known them.
Plot hole: Gripper, Woody, and Randir are suspended from school for two weeks after their involvement in the fight. Woody and Randir appear in the next episode, but Gripper doesn't return until episode 14.
Character mistake: Gripper tells Georgie that he and Denny are bunking off their next lesson to go to the cafe, but they do actually go to their next lesson where they find Randir writing on the blackboard.
Episode #7.2 - S7-E2
Other mistake: When Claire is asking her friends for their dates of birth for her bio rhythm calculator Anita says her date of birth is 25th October 1968, to be in this school year she would have to have been born between September 1967 and August 1968.
Other mistake: Hollo goes into the hall where Perry is with Louise, Cheryl and Julie after Hollo has taken Perry's money for the bet he says "hope you win, Perry". Hollo couldn't know his name when he hadn't met Perry before or been introduced to him.
Visible crew/equipment: When Mrs McCluskey parks in the school car park camera's and crew members are reflected in the side of her car.
Episode #8.9 - S8-E9
Other mistake: When Zammo is talking to Sarah and Mandy in the street, behind them are two women standing watching the filming. (00:07:23)
Episode #2.8 - S2-E8
Plot hole: In this episode Cathy's father comes looking for her, he walked out on his family eleven years ago and had no contact with them during that time. Cathy's mother always told her that her father had died when she was a baby so A) How did Mr Hargreaves know which school Cathy attended? and B) how did he recognize her straight away when he hadn't seen her since she was a year old baby and she was now twelve years old?
Episode #2.3 - S2-E3
Plot hole: Miss Summers tells her class that they have the afternoon off school due to an emergency staff meeting. Penny and Suzi leave the room with the other pupils, Miss Summers stays sitting at her desk. As the two girls are walking down the corridor out of school they stop outside the room that the meeting is in to listen. Miss Summers opens the door and tells them to go away - how did she get to the meeting when she was still sitting at her desk when Penny and Suzi left the room?
Continuity mistake: Robyn celebrates her birthday in episode 12, and as she's in year 10, that would make her 15. However, when she runs away in episode 14, her age is said to be 14.
