Visible crew/equipment: The lighting rig is reflected in the door window of Mr Hopwood's registration class every time it is opened.
Visible crew/equipment: When Trisha is on stage doing her act with the dogs there is a shadow of the boom mike on the scenery behind her.
Revealing mistake: When Gripper and Roland are fighting in the toilets the walls move whenever the two boys fall against them.
Visible crew/equipment: When Clare Scott is talking to her mum in the corridor there is a reflection of the boom mike in the door window behind Mrs Scott.
Visible crew/equipment: Pogo exits the cloak room and the four girls ambush him to steal his trousers. There is a boom mike shadow on the wall to the left of the door.
Continuity mistake: Tucker, Benny and Alan are chased out of Brookdale by five boys, but when they are in the street outside the school there are only four boys.
Character mistake: Miss Summers tells Mr Sutcliffe that she has to check on some our third year friends meaning Jackie Heron, Brenda and Lucy. But these three girls are in fact fifth years.
Visible crew/equipment: When Miss Mooney tells Roland he is exaggerating, a boom mike shadow is visible on the back of two girls' heads.
Visible crew/equipment: During the girls' PE lesson there is a boom mike shadow on the gymnasium wall.
Continuity mistake: During series 6 Jeremy Irvine (Jonah's cousin) is a pupil at Rodney Bennett school and a year younger than Jonah, but when Jeremy transfers to Grange Hill this series he is in the same year as Jonah.
Settling In - S5-E2
Visible crew/equipment: As Mrs Browning is leaving Mrs Mclusky's office a boom mike shadow is seen on the back of her coat.
Episode #4.4 - S4-E4
Continuity mistake: When Mr Hicks says "Move it, Stewart!" when Stewpot is climbing a vaulting box, Hicks is holding a basketball and his arm is stretched out, but when we see Hicks in the next shot, his arm is now by his side.
Continuity mistake: During the fire alarm when the staff and pupils are assembling in the playground, a boy points out judi trapped at a upstairs window to Mr Brisley by saying "sir look." There is no one behind them, the angle changes and there are now a crowd of pupils behind them.
Continuity mistake: During the memorial ceremony for Danny, Ronnie is reading a tribute but starts crying and is unable to finish it. Helen consoles Ronnie by embracing her, the angle changes to Ziggy and Robbie planting the tree and Ronnie and Helen have changed position - both are facing forwards, watching Robbie and Ziggy.
Plot hole: Becky finds the photocopies of Natasha's diary pages in Nick's locker. They all fall out onto the floor as she opens the door, she picks them all up and puts them back inside the locker. Later on at home Becky is reading the diary page about herself - where did she get it from, when she put all the copies back into Nick's locker?
Continuity mistake: While the end credits are rolling Mr McKenzie is taking a photo of Trev and Helen dancing. Behind them Gonch is dancing with Mandy. The angle changes and Gonch is now dancing with Calley.
Episode #8.1 - S8-E1
Continuity mistake: Trevor Cleaver gives Hollo his bag and tells him to put it on the seat furthest away from the teacher. In the first two shots Hollo is holding the bag the right way up, but in the third shot Hollo is holding the bag on its end.
Continuity mistake: At the start of the fight, a boy attacks Gripper with a chair. He is holding it upside down with the backrest against Gripper, who is holding the chair's legs and pushing the boy with it. The angle changes and the chair is the right way up, with Gripper pushing the other boy with it, holding onto the chair's legs. Another angle change and Gripper is holding the chair seat and pushing the boy with the backrest.
Episode #7.9 - S7-E9
Continuity mistake: When the argument starts between Glenroy and John Eastlake, Mr Fowler stands between them. Next shot Sue Shallcross is standing between Glenroy and Eastlake and separates them. Mr. Mcguffy then stands next to Sue, next shot Mr Fowler is standing between the two boys, then the angle changes and Sue and Mr Mcguffy are standing between Eastlake and Glenroy again, with Fowler standing next to Eastlake.
Continuity mistake: Claire Scott is leading the second section of the protest march, she sees the first section start marching towards the school, runs back and shouts "now." She is standing on the pavement in front of the marchers, as the march starts the angle changes and Claire is now in the road to the right of her previous position.
