In the second series, headmistress Megan Bigge has four fake heads mounted on the wall in her office. These represent the school staff from series one: former headmaster Braithwaite, school caretaker (and secret Russian spy) Ivan Poskitt, retired ghost Fanshawe and Bonzo the school cat.
The punk kid in series 2 is known only as GBH, which stands for "Grievous Bodily Harm" (sometimes also called "Good Buddy Harris"), while another student known as being a con-man is called AWOL, from the military term "Absent Without Leave."
Val McLane, who appears here as headmistress Megan Bigge, also appears in Series 2 of Auf Wiedersehen, Pet as Dennis Patterson's sister - in real life she is the sister of Auf Pet star Jimmy Nail.