Also, the grammar schools are starting to look a bit 'tired' and the facilities at the private schools are getting better and better.
Our local state grammar schools are certainly "tired" as they didn't sell their souls to access the grants/subsidies of the last 10-20 years - their main building is condemned due to leaky roofs etc and has to be moth-balled.
There's a comp just over our county border in a small village - it has come from nowhere on the back of "ticking boxes" to get millions of state/EU funding. Theatre, sports halls, all weather pitches, computers on every desk in every room - you name it, they have it.
Despite all the money thrown at it, the comp is still under-performing, despite it being in a leafy, rich county. It's got a horrid reputation for bullying and rolls are falling! Staff are leaving like rats off a sinking ship. This isn't in a deprived area!!
The grammar, on the other hand, remains popular, over subscribed, has virtually no bullying, yet is in a much more deprived area. It's clearly grossly underfunded, looks awful to an outsider, but the kids are happy and successful there!
My point is that money is no guarantee of success. Huge amounts have been pumped in to build new schools, but some have still failed.