I grew up in the noughties (British) and for ages since then, I’ve always had this fragmented memory of this episode of a tv show, likely on CBBC or CITV, it was a live action show. In this episode, a teacher instructs the caretaker to construct a cage for the back of the classroom. Later in the episode, as the teacher is teaching, you can see a student stood in the cage watching from the back of the class.

Always struck me as kind of a weird thing. Any idea what this would be? What show and what episode it might be? It’s been driving me insane for years and Google is no help (nor Reddit)!!!