PooshTun - I thought you started this thread to discuss Grammar schools, yet your children are at independent schools.
Back in the 70s when you took your 11+, so did I and I got a fully funded place at an independent school courtesy of the LEA, as it freed up a Grammar place for another child. My parents are very working class, and really struggled to buy my school uniform for me. But they did it.
I had no tutoring, but passed both the 11+ and the indie entrance exam. It opened my eyes to another world - one that I couldn't fit into at 6th form as all the girls were in designer outfits and had their own cars bought for them by their wealthy parents.
My extremely bright and hard working friend failed the 11+, and was condemned to a sink secondary modern where he was unable to even sit a proper range of O-Levels.
On the other hand......
My DH grew up in a leafy middle class area that had no 11+, he attended the local comp, did extremely well, went to RG Uni, joined the fast stream Civil Service, & was head-hunted to work in the most prestigious department within his discipline.
Sadly I think that the true purpose of Grammar schools has been lost. If I could change one thing it would be to say that state Grammar schools should only be available to children who have been in the state system for all their primary education.
But in preference I would replace them with better Comprehensive schools. In fact, if you are going to have a system that takes out one group and educates them separately then I would support a system that identifies those students disaffected by school and put them together with a separate curriculum that engages and involves them.
Sorry this has turned into an essay - English was always my favourite subject 