Episode #4.2 - S4-E2
Visible crew/equipment: There is a lighting rig reflected in the door windows when Mr. Thomson tells Tucker, Alan and Tommy to get out.
Visible crew/equipment: When Mr Baxter is in the phone box, you can see the camera reflected in the glass as the door closes.
Episode #3.5 - S3-E5
Continuity mistake: During the assault course when Anita is going under the bar, Anita gets under before the girl next to her in the yellow top but when the angle changes to the climbing frame the girl in the yellow top is way ahead of Anita.
Continuity mistake: When Tucker, Alan and Benny ambush the Brookdale boy, Alan is sitting on top of the Brookie pining him down. When the angle changes Alan is sitting beside the Brookie - he has not had time to move.
Episode #2.4 - S2-E4
Visible crew/equipment: When Trisha is asking Sudhamani if she is going to the disco, when Sudhamani says "well if I'm late my father will want to know where I've been" you can see the shadow of the camera moving on the blackboard.
Episode #2.2 - S2-E2
Continuity mistake: When Andrew and Justin are walking home a white car on the road behind them slows down to go through the width restriction and then disappears, as it does not drive past them when the angle changes, and there was nowhere else for it to go.
Episode #2.1 - S2-E1
Other mistake: At the football match Simon Shaw complains to Mr Baxter that he was driving the minibus too fast, but when they left school another teacher was driving the minibus and Baxter was sitting in the passenger seat.
Episode #1.7 - S1-E7
Character mistake: When Mr Mitchell is counting the votes, he says that 23 pupils voted - he reveals Ann Wilson got 11 votes, Peter Jenkins 7 votes, Michael Doyle 3 votes plus 2 blank votes and 1 for someone's budgie which equals 24 votes.
Episode #1.7 - S1-E7
Visible crew/equipment: In the art class when Judy and Trisha are discussing if Miss Mather is Mr Mitchell's girlfriend you can see the boom mike in shot.
Episode #1.2 - S1-E2
Visible crew/equipment: In the playground when Tucker and Benny are telling Mr Mitchell about Benny's lack of football boots, when the camera is on Benny you can see its reflection in the window behind him.
Episode #1.1 - S1-E1
Continuity mistake: When Ann Wilson is asking Jackie Heron for directions, the position of Ann's hair changes between shots. When seen from her front Ann's hair is behind her ears, but when viewed from behind Ann's hair is covering her ears.
Episode #1.1 - S1-E1
Visible crew/equipment: As Justin's fathers car pulls out of the driveway you can see the film crew reflected in the side of the car.
Episode #1.1 - S1-E1
Character mistake: When Mrs Munroe is calling out the pupils' names in the hall Alan's surname is Turner, but according to the credits at the end of this episode his surname is Hargreaves.
Audio problem: When Mr Baxter comes into the coach after contacting the holiday company, Miss Lexington tells him it was worth a try, to which he replies,"Yes it was." We then cut to the pupils who are seen cheering, yet no words are heard.
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.
