Continuity mistake: When Duane and Stewpot are following Pogo in the playground, the same two girls walk past them twice.
Continuity mistake: The minibus that the school goes to the outdoor centre in is a different vehicle than the one Mr Hopwood purchased from Alan's dad for this purpose in the previous episode.
Continuity mistake: When Gripper's gang have cornered Randir in the toilet cubicle, one of the gang is standing with the others outside the cubicle shouting abuse at Randir. The angle changes and he's standing at the sinks next to Gripper.
Episode #4.6 - S4-E6
Continuity mistake: Tucker, Benny and Alan are in the hall for Mrs McClusky to announce the winner of The Competition to design the front cover of the school magazine. The shots alternate between Tucker and co and Mrs McClusky - every time the camera is on Tucker, Benny and Alan there are different people standing in front of them.
Continuity mistake: When Tucker is attacked by the Brookdale boys they pull his blazer off and one of them starts chalking B R O on the back, then the angle changes and "Brookdale no. 1" is written in full.
Continuity mistake: When Miss Peterson falls over during the tug of war, Mr. Hopwood rushes over to see if she is all right. In the long shot she falls on her back, but in the close up she is face down.
Episode #1.8 - S1-E8
Continuity mistake: At the start Benny chases Tucker out of the basement. When they reach the top of the stairs look at the four extras that walk past them: a blonde girl with a red duffel bag, a brown haired girl with a basket, a boy with a black sports bag and a boy with a black Adidas bag. When Benny and Tucker's chase reaches the corridor, the same four extras come out of the classroom on the left.
Continuity mistake: As Doyle is running for the coach he is carrying a brown bag as he boards the coach. Mr. Mitchell tells Doyle off for being late and Doyle's brown bag has disappeared, but he is carrying it again as he walks down the aisle to the back seat.
Continuity mistake: The students action group (SAG) led by Jessica Samuels protests on the sports field during the cricket practice. Mr. Baxter tells them to move and they ignore him, Baxter then says "I've no intention of telling you twice" and they all walk off. The angle changes and Jessica is standing alone - all the kids that were standing around her have disappeared. Jessica was looking to her left as the kids walk off, then to her right at Baxter, then turns to her left to walk off. Another angle change and Jessica is looking to her left before turning to her left and walking off for a second time.
Episode #3.8 - S3-E8
Continuity mistake: During the mime class when Mr. Sutcliffe says "let's get down to some mime" Tracy is about to sit down. The angle changes and Tracy has sat down without having had enough time to move. Also there is no-one sitting on the floor between Duane and Tracy, but when the angle changes Duane and Tracy are sitting further apart, and the girl in the red and white top who was sitting behind them is now between them. Another angle change and all the other kids have changed position.
Continuity mistake: When Ian and Dai hard are on the roof the sky changes from being overcast to clear blue.
Continuity mistake: Calley and Georgina are sitting a mock exam that Mr. Robson is supervising. Later on Calley and Georgina have somehow got out of the exam and are at the unveiling of the advert in the corridor. The next scene Mr. Robson is in Mr. Hargreaves' office when Chrissie is being falsely accused of swapping the adverts over, later on Robson is back in the classroom when Calley and Georgina finish their exam.
Continuity mistake: Mrs McClusky's first name is Brigit, but the sign on her office door says Mrs. M McCluskey.
Continuity mistake: In the final scene when Pogo and his girlfriend get on a bus it is on route 260 to Hammersmith Broadway, but when they are on the bus waving at Duane and Stewpot from the back window it has changed to route 27 to Richmond.
Episode #3.6 - S3-E6
Continuity mistake: Mr. Garfield finds Pogo in the bike sheds when they are out of bounds during school hours. Garfield says he will take him to Mr. Keating, but Pogo gets a telling off from Mr. Curtis.
Continuity mistake: In some episodes Christophe's motorbike has French number plates and in others it has British number plates.
Continuity mistake: Michael Doyle is sitting on the back seat of the coach between Alan and Andrew, when he plays the prank on Penny Mr. Mitchell moves him to a front seat, but when the coach stops to let Justin off when he feels sick, Doyle is back between Alan and Andrew.
Continuity mistake: In some episodes Grange Hill has its own on site swimming pool but in others it hasn't, and the pupils have to go to the local leisure centre.
Continuity mistake: Tarquin and Forbes arrive at school in Tarquin's sports car. The car keeps disappearing and reappearing during later shots of the car park.
Continuity mistake: In the panic when the hall is evacuated for the bomb alert, Sammy's tiara is knocked off, the angle changes and it is back on her head. Then when the pupils are allowed back in, Sammy and Alex are the first pupils back in the hall - Alex picks the tiara up off the floor and places it on Sammy's head.
