i've moved the nursery school to replace the "special needs school" having checked if the latter existed on Edubase, but i'm still unsure.

that being said, NEVER walk onto schools/nurseries, or even hospitals and carehomes to survey. These places are meant to be kept off from the public, you're a stranger to everyone on site, and as you said, they may not have heard of OSM. The staff are just doing their jobs.

https://wiki.openstreetmap.org/wiki/Mapping_techniques#Privacy