Not since i last attended one as a child, no. That school has been through every grammar, state, academy, foundation name you can think of but still the problem remains the same.
It is now as it was then but worse, far too much is done to pander to the minority of children who are disruptive, undisciplined and make it their mission to make it harder for everybody else who wants to learn. Much of that comes from parents whose immediate response to criticism of their little darling is to blame the teachers/school/government/private schools. Nothing at all will ever change as long as society pussy foots around those people. They have been given endless carrots and maybe it's time to offer them a stick, or cast them off and move forward for the good of the 99.9% of children.
The biggest benefit of private schools is not the facilities, the money or the quality of teaching. It's the non existence of problem children networking with other like-minded parasites, determined to hog all the best jobs and keep the proles in their place. Grammar schools achieve much the same result by having entrance exams and the best state schools do it by interested parents economic leeches hoovering up property in the catchment zones and forcing the bad families poor people out. Labour could do something to address it holistically but their idea so far is placate them even further by tabling rules apparently it's a bad thing nowadays to say Hitler had the right idea and people have annoying things like human rights, which make it harder to remove those kids.