Other mistake: When Hudson is briefing the girls' football team he calls Mel Sarah, mixing up the character name (Mel) and actress (Sarah Lawrence).
Girl Gangs - S5-E13
Other mistake: Mrs Ross is wrongly credited as Mrs Rose in the end credits.
Episode #7.3 - S7-E3
Other mistake: Jeremy is making a copy of Zammo's bus pass - the expiry date on it is 16th December 1983, this series is set in 1984.
Other mistake: Tucker, Alan and Tommy miss the bus because the driver won't wait, a few minutes later the next bus arrives and it is the same vehicle as the previous one (registration number AML3H).
Other mistake: When Mike is showing Robbie the newspaper in the school common room it is dated August. The school year runs from September to July, schools are closed during August for the summer holidays.
Other mistake: Jeremy tells Zammo and Jonah that his school, Rodney Bennett, has a headmaster called Mr Rathbone, but according to the sign outside Rodney Bennett the school has a head mistress, called Miss Carol.
Episode #2.3 - S2-E3
Other mistake: Mrs Stanton sends Andrew to the shop for some ice cream but he is only gone for 30 seconds, which is not long enough.
Other mistake: All throughout this series Grange Hill is celebrating 125 years on the same site, but Grange Hill didn't move to this site until series eight in 1985, when the school merged with Rodney Bennett and Brookdale schools, this being the former Rodney Bennett site.
Episode #2.1 - S2-E1
Other mistake: After assembly Simon Shaw tells Mr. Mitchell that he been transferred into his form, but earlier on, before assembly, Simon was already sat in Mitchell's form.
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 #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.
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)
