I think it’s been just over 10 children the last two years at Hamilton, mostly boys. I believe that is more than typical. That’s only grammar, no idea about private. Of the current year 7s at CRGS, 8 of them come from Hamilton.
Have you visited both schools? Oxford house works the children very hard and preps for the 11+ extensively. Smaller class sizes, etc. DC typically start there age 2-3 and are in full time nursery/ education age 3-4. In my opinion - advantage is DD is likely to get a grammar place, disadvantage is at what cost? There are other private/ prep options if Oxford house doesn’t suit your DD.
Hamilton has no green space which is a shame. A mixed demographic in terms of socioeconomic status and ability. Class sizes of 30 pupils. As it is state, it is bound by the national curriculum. Very keen on SATs. Funding issues like all state schools.
For context, my DC attend Hamilton. They are both able and I’m sure would be doing much more at Oxford house. However, I like that they are not. My DH and I both went to the grammars. I moved back to Colchester when pregnant because I want my DC to have the same opportunities. Now - I couldn’t care less as long as they’re happy. (My DS6 does assure me that he will be going to the ‘exam school’ because they have a pool)
I find it entertaining how much my attitude had changed to many things during this parenting journey.
Good luck deciding - I hope you find the right school for your DD to thrive.