Ireland
I hate to be a pessimist, but meeting with this teacher (who is THE culprit) would be worthless. Ditto with his superiors.
If I were you, I would do everything humanly possible to change schools.
Failing this,legislation does exist in the UK concerning this behavior, I would hire an attorney who is knowlegeable in education law and let the attorney meet with the main administraion officials for a chat, with the probability of legal action if the chat is not sufficient.
My wife and I spent 10 agonizing years dealing with ignorant and incompetent teachers and school officials, fighting for our learning- disabled son. When we finally found a really "tough broad", sympatico and knowledgeable lawyer, everything suddenly changed for the better.
We had an impartial hearing and the school board finally made themselves agreeable.
Some of the damage done to my David still persists and he expresses the desire to "get even" with one particularly bullying teacher. It's funny how one f'ing S.O.B of a teacher can eclipse the memory of dozens of caring and dedicated teachers.
Larry Parish