I think state schools are unlikely to ever give the same level of service as they have much more sparse funding, but a good state school gives some of it.
My dc's primary school had a teacher to greet the dc every day, though not until 8.40.
We had similar staffing numbers, though that was due to being a tiny rural school. Had there been a birth increase in the area there could have been 30 dc in the class.
The environment was calm, but again, this is largely down to the other dc in the class I think.
Yes to weekly forest school and real books (I think that one is definitely a standard in all schools).
Pe twice a week (smaller range of activities I suspect), after school club until 5 (but a limited range of activities, mainly craft and games). Two trips a year (at Christmas and in the summer, but I'd guess cheaper places than a private school might choose).
Lots of space, a vegetable garden and flourishing gardening club.
The meals varied a lot depending on which cook was working.
On the whole, I was very happy with the school and paying for private school wouldn't have been worth it for us. But I think a lot depends on the school and area, we were quite lucky I think.