My son was in the exactly the same situation one year ago. But coming all the way from independent prep school not state but that didn’t make a difference.
I think I know the school but won’t name.
Think about the hours. They are long. Very long. How close do you live from the school days are exceptionally long as driving can wear you out too. Is your child super sociable? Being only 20% of day pupils they are going to have to be super confident or able to chat. That was my biggest issue always feeling missing out and not gelling with the majority of other children,
The joys of Saturday school before sport - does your child want to do it. That’s the main question. Also, does the school do your favourite sports - some footy / rugby / hockey are they specialising in your child’s favourite sport.
Once you get into the school the league of good sports players everyone seems very average 🤣 as everyone is quite amazing.
Also this is a life style change especially if not boarding and no daily buses.
Do you want the hassle as a parent who is always going to have to pick them up / drop off
However if it’s the same school there is more flex on boarding / flex than that initially first stated when they knew we were potentially pulling out,
Suppose you have to decide what will be the school your child will be attending and how much flex do you have for drops / pick ups etc
Also, we knew my son would probably feel left out and we would have to accept board. We knew that but didn’t necessarily want that.
Luckily we managed to secure another independent senior manager school at the last minute
Good luck