Didn't the old buses used to have safety straps to put on to stop people jumping off but the conductors never bothered with them most of the time.
I lived on the Beeches Estate and for some reason the Midland Red had that route. In early days they used front entrance double deckers and these were very tricky to jump on and off when moving. Jumping off was not too bad, but a miss jumping on could cause a nasty encounter with the rear wheels. Perhaps it was a good that open platform buses faded away...
Mention is made of bell puses in an earlier post. I always considered the pull cord (rubber coated I think) which ran the length of Midland Red buses extremely antiquated. However, BMMO conductors may think it was a better system than leaning over passengers; especially those of short stature.