I attended a co-ed secondary school in the late sixties and early seventies.
We had two P.E.Masters who both administered CP almost every lesson, as far as I can recall there was always some boy touching his toes or bending over the vaulting horse.
Now one of these masters always used the plimsoll, with devastating effect may I say, but the other master used a small cricket bat.
It looked like it came from a child’s set and had a red rubber grip all the way down the handle,he once sent me to fetch it from the changing rooms for him, before joining another boy bending over the vaulting horse.