I'm not fundamentally opposed to Grammar schools, but the way they are implemented is the key. The 11+ system is unfair, and a system of continuous assessment throughout Primary school would be better.
That's exactly what happened to me nearly 30 years ago. My teachers monitored everyone and those they thought would stand a chance of passing it were put forward. I was put forward, but failed it.
Meridian said:1) Because the pro-grammar school people tend to go either very quiet, or into full-on meaningless platitude mode when you ask: what happens to the children who don't get into one? There are ten mentions of grammar before anyone says: secondary modern. That's the elephant. because as soon as you split the system, you split children into successes and failures. You can add caveats about re-streaming, transfer, and any stuff you like about how other types of school ore fine, but employers simply don't believe you. All the good jobs will go to those who came from grammars. We know this because it happened last time - some of us are old enough to remember.
I'm doing ok for a comprehensive student, thank you very much. Even got a University degree on my own merit. Grammar, Comprehensive, whatever - you work hard you stand a better chance of succeeding. You slack off, you end up working at [insert menial job here].