My LA wlll only exclude for 3 days. There is no longer any such thing as expulsion. Instead, the LA will sometimes try to persuade the parents of violent children to agree to a whole-school transfer within the LA, thus moving on the problem.
Off-Campus provision has been cut and a pupil will only be considered for this if they're "known to the police". Even then, there's little guarantee of a place.
Nowadays, Police Scotland will do nothing with regard to children under the age of 16. How do I know? As a middle manager, I called the police myself or persuaded the SLT to do so.
In my last year in my permanent post, we had two incidents where two different boys brought in a knife. One incident where a boy held a screwdriver to a girl's throat.
The police did nothing other than talking to the pupils. The mantra is "We'll leave it in the hands of the school."
One pupil broke another pupil's nose during lunchtime, outside the school grounds. The police were called. The perpetrator was under 16. The police did nothing.
The victim stopped attending school.
The one time I can recall that the police acted was many years ago. A pupil inexplicably disappeared from our roll. It turned out that they had set fire to a homeless person.