I know my opinion is of little importance... but I think all children deserve an education. If the child is having problem and is threatening other children, then the school has to provide an alternative, so the child does not loose his/her education.
I am considering home school for my teen son. I live in the US, so this is an option. I want him to have a consistent education during his teen years, and he attends public school, but I am moving his freshman year. My boy is really bright, but I have had to fight with the teachers to get him motivated. He is bored because he knows what they are teaching and he wants to spring ahead while other students need the extra attention. He has not made the grades to get ahead because he is bored.
I think this is an education problem. The people of Great Britain need to educate their children, as we do in the US.