I am a total advocate for comprehensive education and personally did very well from it. I went to a tough school with a tough and very mixed intake and I came out with very good results and have a strong degree from a Russell Group Uni. I should also add that apart from maths and science, my teaching was mixed ability.
I didn't do well because I was an exception, or because of strength of character or whatever - I did well because of a teaching staff who worked hard, knew their kids, and constantly innovated. I don't think my school was unusual in my area either. Comprehensive schooling worked for me and for my peers.
The idea that unless a ridiculously high number of kids from each school are getting into Russell Group Universities and above then the school is failing frustrates the hell out of me. School is about more than academic success surely?
I just wish people would be honest - they like grammar schools as long as their kids are in them. What they really want is for kids who are less able than they perceive theirs to be, to be out of the way so that they won't 'hold their kids back.'
When did it become the case that a less academically able kid is always going to be disruptive and a negative influence? I had absolutely no sense of being 'held back' by my being taught alongside all levels of ability, and on top of that I learnt to exist in a mixed community. Personally I think that's set me up well for real life. I worry more about the kids who are tutored and tutored to within an inch of their lives to get into grammar and then struggle for the entirety of their secondary career.
Incidentally there is more than one grammar school teacher in my extended group of friends / acquaintances who would dearly like to shift into comprehensive education because they don't feel able to actually 'teach' at their schools. There's a feeling of stagnation, and not being allowed to try new things in case it rocks the 'outstanding' boat. I'm absolutely sure that this isn't the case at every grammar (and that there are non- grammars which are guilty of the same thing). My point is that teaching is not necessarily better at grammars - lots of actual teachers don't think so.
But this is my opinion and I appreciate not everyone agrees with me. Each to their own and all that!
Interestingly my DH had a very positive and successful time at grammar, but as an adult is principally against grammar school education because it is not and can never be fair. In his opinion of course. 