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.
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.