At the end of my last year at Marple Hall (aged 19 and a prefect!) I sloped off at lunchtime, with the other 6th form leavers, to the Hare & Hounds. The Headmaster - Reginald Hill - caught us (I think the landlord may have shopped us!). He stood in the pub in front of an audience and gave us such a dressing down about leaving school with out permission. But worse than that - he shamed us thoroughly by saying we had let him down and we'd set a bad example to the younger pupils!
Never been in the H&H since but I remember the incident every time I drive past!