There was also detention down this way. When I started at Grammar in 1963, this was on a Saturday morning & meant uniform had to be worn, too.
At MGS, about six masters used the slipper(or metal ruler/piece of wood if you were the Woodwork teacher!)when I started & none were using it by the time I left in 1970. I didn’t regard the size 11/12 firm-soled plimsolls in use as a joke & I only got the one 1-stroke(?)job from the aforesaid Woodwork master-and a bash on the head with the bit of wood, which broke the bloody wood, too!
I can’t say any of this acted as a deterrent to me. But detention struck me as a serious inconvenience until they shifted it in the 3rd year to Tuesday & Thursday nights, the former being Returned Work Detention for dullards or copiers of another’s homework(trust me to pick the wrong one in my Maths set to crib from!).